The options
Add shortcut to OneDrive #
A shortcut drops a company folder into your own OneDrive. It is a pointer, not a copy. Nothing is duplicated, nothing moves, and it uses none of your storage.
Once added, the folder appears inside your OneDrive everywhere you already look at OneDrive: File Explorer on Windows, Finder on a Mac, the OneDrive website, the OneDrive app on your phone, and Teams. A small link badge on the folder icon marks it as company content rather than your own.
What makes it the better option
- It follows you. Sign in on a new laptop and the folder is already there. There is nothing to set up again.
- You can take just one folder. If you only work in
Projects/2026, you can have that, rather than the whole library and everything anybody else has ever put in it. - It uses none of your OneDrive space. The files still count against the SharePoint site they live in, not your personal quota.
- It is faster. The sync app has less to keep track of, so folders open more quickly and it uses less of your machine.
- It is what Microsoft recommends. Their guidance calls it the more versatile option, and the Sync button is quietly being pushed into the background.
It is not a copy. The files inside a shortcut are the real, live company files. Change one and your colleagues see the change. Delete one and it is gone for them too. More on that below.
It is not a backup. Having a folder in File Explorer does not mean you have your own safe copy of it. If you need the files available with no internet at all, that is a separate setting, covered further down.
The limits on shortcuts themselves
| Limit | The number |
|---|---|
| Shortcuts from any one person’s OneDrive or Teams site | 100 |
| Shortcuts in total, across everything | 1,000 |
| Storage used from your OneDrive quota | None |
| Can you shortcut a single file? | No, folders and libraries only |
| Available to guests and external people? | No, internal staff only |
Nobody hits a thousand shortcuts by accident, so in practice the only one of these that matters is the last: if you are a guest in somebody else’s Microsoft 365, the option will not be there for you. Use the browser instead.
The options
The Sync button #
Sync wires an entire document library to the computer you are sitting at. It has been around far longer, which is why most people reach for it, and it is almost never what you actually want now.
A synced library appears in File Explorer under a heading named after your company, alongside your OneDrive rather than inside it. That separation is the one genuine advantage it has: personal and company files stay visibly apart.
Why we have moved away from it
- It is per device. New laptop, home PC, a machine you borrow for a day: each one needs setting up from scratch, and people forget.
- It is all or nothing. You get the whole library. If the library holds 80,000 files and you need one folder, the sync app still has to track all 80,000.
- It fails quietly. The classic support ticket is somebody working happily for a fortnight while a small icon near the clock has been showing a red cross the whole time. Nothing they saved has reached anybody.
- It is heavier. More files being watched means more disk, more memory and slower folders, particularly on older machines.
There are a few cases. A shared or production machine that a whole team signs into. A line of business application that insists on a fixed path in a fixed place. A library that has to be on a particular server regardless of who is logged in. Where one of those applies we will set it up deliberately and tell you, rather than leaving you to guess.
SharePoint cannot be mapped as a network drive, and the old trick of mapping it through the browser is
unsupported, breaks regularly and loses files. If you are still using a mapped S:\ drive
pointed at SharePoint, tell us and we will move you onto something that works.
The decision
Which one you want #
Two questions, and for nearly everybody the answer comes out the same way.
Side by side
| Add shortcut | Sync | |
|---|---|---|
| Attached to | You | One computer |
| Follows you to a new machine | Yes, automatically | No |
| Appears in File Explorer or Finder | Yes, inside OneDrive | Yes, under your company name |
| Appears on your phone and the web | Yes | No |
| How much you can take | One folder, or the whole library | The whole library only |
| Uses your OneDrive storage | No | No |
| Needs disk space on the machine | Only for what you open | Only for what you open |
| Works for guests and external people | No | Sometimes |
| Microsoft’s recommendation | Yes | Still supported, no longer preferred |
| Our recommendation | Yes | Only where we have set it up on purpose |
Practicalities
Setting one up #
It takes about fifteen seconds, and you only ever have to do it once per folder.
If the library is large and you only work in part of it, add a shortcut to that part. Everything stays faster, there is far less to go wrong, and you still reach the rest of the library in the browser whenever you need it.
Removing one again
This matters more than adding one, because the wrong option here deletes company files. On the OneDrive website, or by right-clicking in File Explorer, choose Remove shortcut. That takes away your route to the folder and touches nothing else. Everyone else carries on as normal.
Remove shortcut removes your link. Delete deletes the folder and everything in it, for the whole company. The two options sit next to each other in the same menu.
Practicalities
Cloud icons and working offline #
Whichever option you use, the files are not all sitting on your hard disk. You see every file name, and the contents arrive when you open them. The little icon beside each one tells you where it currently is.
Getting a folder onto the plane with you
Seeing a file name in File Explorer does not mean you have the file. On a train with no signal, a blue cloud is just a name. If you know you will be offline, right-click the folder and choose Always keep on this device, then leave the machine connected until the icons have all turned solid green.
A large folder can take a long time to come down, and it needs the disk space to do it. Pinning something on the way out of the door is the single most common reason people arrive somewhere with no files.
The reverse is Free up space, which pushes the contents back to the cloud and leaves the names behind. Useful on a machine with a small disk. It does not delete anything.
Read this bit
The mistake that deletes files for everyone #
This is the part of the guide that matters. A synced library or a shortcut in File Explorer looks exactly like a folder on your own computer. It is not. It is the company’s live files, and File Explorer gives you no hint of the difference.
Drag a folder to the bin because you have finished with it, or tidy up some files you think are yours, and the deletion travels straight back to SharePoint. Within a minute it is gone for everybody in the company. There is no warning that says “this will affect 40 other people”.
Do
- Use Remove shortcut when you have finished with a folder.
- Use Stop sync in the OneDrive settings to disconnect a synced library.
- Treat everything inside a shortcut as shared, because it is.
- Tell us straight away if you think you have deleted something you should not have.
Do not
- Delete a synced or shortcut folder to “free up space”.
- Tidy up files inside one without checking whose they are.
- Drag a shortcut folder somewhere else to reorganise your desktop.
- Assume the recycle bin on your computer has a copy. Usually it does not.
Four more that catch people out
Moving a file out of a shortcut into your own OneDrive moves it out of SharePoint. It is not a copy. Your colleagues lose it, the file takes on your permissions instead of the folder’s, and nobody can find where it went. If you want your own copy, copy it rather than dragging it.
Renaming a shortcut only renames it for you. That is by design and it is often useful, but it means that when you tell a colleague the file is in Contracts, they may be looking at a folder called something else entirely. Say which SharePoint site it is in, not what your copy of it is called.
Deleting a shortcut while files inside it are open can delete the files. Close Word and Excel first.
Both buttons on one library breaks it. Sync and Add shortcut cannot coexist on the same library, so if one person sets up one and then tries the other, syncing stops with an error rather than quietly doing something sensible.
Do not panic and do not start putting it back by hand. Deleted items go to the recycle bin of the SharePoint site they came from, not yours, and they generally sit there for 93 days. Tell us what was deleted and roughly when, and we will restore it, along with the version history.
Tell us the same day if you can. Restoring something last week is routine. Restoring something from four months ago is a different conversation.
Read this bit
The limits that actually bite #
Files usually stop syncing for one of a small number of reasons, and almost all of them are about names and counts rather than anything being broken.
| The limit | The number | What happens when you cross it |
|---|---|---|
| Length of the whole path | About 400 characters | The file will not sync, or Office refuses to save it. This is the most common one by a long way, and it is nearly always caused by folders inside folders inside folders. |
| Length of any one file or folder name | 255 characters | Same. Watch for filenames made from a whole sentence. |
| Characters you cannot use | " * : < > ? / \ | |
The file is skipped. A space at the start or end of a name does it too, which is invisible and infuriating. |
| Names that are not allowed at all | CON, PRN, AUX, NUL,
COM1–COM9, LPT1–LPT9,
desktop.ini |
Skipped. Also anything starting ~$ or ending .lock, which are
temporary files Office leaves behind. |
| Biggest single file | 250 GB | Refused. In practice only video and disk images get near it. |
| Total items synced across everything | About 300,000 | Nothing errors. It just gets slower and slower, gets stuck on “Processing changes”, and eventually stops keeping up. This is the one that hurts quietly. |
The count includes every folder on the way down, and it starts inside your OneDrive rather than at the library. Five levels of nesting with descriptive folder names, then a file called Final version signed by both parties 14 March 2026 (revised).docx, and you are there. If a file stubbornly refuses to sync and the name looks fine, it is usually the depth.
The fix is the same every time: shorten the folder names, or flatten the structure. Shortcuts help here too, because a shortcut can start further down the tree than the library root does.
Libraries that will not sync at all
Some settings on a library stop it being used this way entirely. If a library requires documents to be checked out before editing, has a required column that must be filled in on every file, or has rights management applied, it will either refuse to sync or come down as read only. That is deliberate, because none of those rules can be enforced from File Explorer.
If you hit one, use the browser for that library. Tell us if it is somewhere you need to work every day and we will look at whether the setting is still needed.
We can turn the Sync button off across a whole tenant, leaving shortcuts as the only route, and on many of the tenants we look after we have. We can also block syncing entirely on computers we do not manage, so company files cannot end up on somebody’s home PC. If either sounds like something you want, ask us.
Practicalities
Teams, channels and where files really live #
Every Team has a SharePoint site behind it, and every channel is a folder in that site’s library. The Files tab in Teams is a window onto SharePoint, not a separate place.
That is why the same two buttons appear there, and why a shortcut added from Teams behaves exactly like one added from SharePoint. It is also why files posted in a chat are not in the Team at all: those live in the sender’s own OneDrive, which is a common source of “I definitely shared that with you”.
Standard channels are folders in the Team’s library, so one shortcut covers them. Private and shared channels each get their own SharePoint site with their own library, so each one needs its own shortcut, added from that channel’s Files tab.
If you have added a shortcut to a Team and some channels are missing, this is why. It is not broken.
A sensible pattern
- One shortcut per Team you work in daily, added from its Files tab.
- Nothing at all for Teams you dip into occasionally. Use Teams itself.
- Never a shortcut to somebody else’s personal OneDrive folder for shared work. If more than one person needs it, it belongs in a Team or a SharePoint site.
That last point is worth dwelling on. Work stored in an individual’s OneDrive disappears when they leave, and getting it back afterwards is a job rather than a click. Shared work belongs somewhere shared.
Practicalities
Moving from Sync to a shortcut #
If you already have libraries synced the old way, they can be swapped over. Do it in this order, and check each step rather than rattling through.
- Make sure the sync is finished and healthy Click the OneDrive cloud near the clock. It should say your files are up to date. If there are errors or files waiting, deal with those first. Anything not yet uploaded only exists on that computer.
- Check your recent work is actually in SharePoint Open the library in a browser and look for the things you saved this week. This is the step people skip, and it is the step that saves them.
- Stop the sync OneDrive settings, then Account, find the library and choose Stop sync. This does not delete anything from SharePoint.
- Leave the old local folder alone for now Stopping sync usually leaves the downloaded copy behind. Do not delete it yet. It is your safety net until you have confirmed everything is in SharePoint.
- Add the shortcut Back in the browser, select the library or the folder you actually want, and choose Add shortcut to OneDrive.
- Check it, then tidy up Confirm the folder appears in File Explorer with the link badge, open a file, save a change, and check it in the browser. Only then delete the old local folder.
Do not stop a sync and add a shortcut on the same library in the same breath without checking in between. If the old sync has not fully released the library, the shortcut will fail with the “already syncing a shortcut” error and you will end up with neither.
If a whole team needs moving over, ask us rather than sending everyone this page. We will check what is currently synced, what is not yet uploaded, and what is going to hit a path length limit before anybody presses anything.
Support
If something goes wrong #
The usual symptoms, and what is actually going on behind each of them.
| What you see | What is going on |
|---|---|
| “You’re already syncing a shortcut to a folder from this shared library” | Sync and Add shortcut have both been used on the same library. Remove the shortcut from your OneDrive, or stop the sync, then set up whichever one you want. Not both. |
| The shortcut is on the OneDrive website but not in File Explorer | Check the OneDrive app is running and signed into your work account rather than a personal one. Then check it has not been excluded under Choose folders in the settings. It can also just be slow on the first sync. |
| A red cross on the OneDrive icon near the clock | Nothing is syncing, and has not been for however long the cross has been there. Do not carry on working and hope. Tell us the same day. |
| Stuck on “Processing changes” for hours | Usually far too many items being tracked. This is the 300,000 figure catching up with you. Using shortcuts to specific folders instead of syncing whole libraries is the real fix. |
| One file refuses to sync, everything else is fine | Its name or its path. Look for a stray character, a space at the end of the name, or a path that has got too deep. Renaming it or moving it up a level usually clears it immediately. |
| Files are there, but nothing opens on the train | They were online only. Right-click and choose Always keep on this device, in advance, next time. |
| A folder disappeared from everyone’s view at once | Somebody has deleted it through their synced copy or their shortcut. Tell us, and we will restore it from the site recycle bin. |
| The Add shortcut button is not there | Either you are a guest in somebody else’s Microsoft 365, or that library already has a shortcut or a sync from your account, or it has been turned off for that site. Ask us which. |
| Two folders with the same name in File Explorer | Two libraries called Documents, from different sites. Rename your shortcut to something meaningful. Renaming a shortcut only changes what you see, so nobody else is affected. |
| It all worked until you got a new laptop | The old machine was using Sync, which does not travel. This is the single best argument for shortcuts, and the most common way people discover it. |
Do not unlink the account, reset OneDrive or reinstall it to fix a sync problem. If anything on that machine has not yet been uploaded, those steps are how it gets lost. Tell us what the error says and we will look before anything is unpicked.
Support
Common questions #
Does a shortcut use up my OneDrive storage?
No. The files count against the SharePoint site they live in, not your personal quota, however many shortcuts you add. The only space used is on your local disk, and only for files you have opened or pinned.
Can I add a shortcut to a whole library, or only a folder?
Either. Select nothing to take the library, or select one folder to take just that. Taking one folder is usually the better idea, because there is less for your computer to keep track of.
If I remove a shortcut, do I lose the files?
No, as long as you use Remove shortcut rather than Delete. Remove shortcut takes away your route to the folder and nothing else. Delete removes the folder for everybody.
Can I still use Sync if I prefer it?
Where it is still available, yes, and it is not going to stop working tomorrow. But it will not follow you to a new computer, it is harder to support, and on a number of the tenants we look after we have turned the button off entirely in favour of shortcuts. If it has gone from your sites, that is why.
Is this a backup of our files?
No, and it is important not to think of it as one. A shortcut or a sync is a live view of the same files. Delete one and it deletes everywhere. Microsoft keeps deleted items in the site recycle bin for 93 days and keeps version history, which covers a lot of accidents, but it is not the same as a backup. If you are not certain what your backup arrangement covers, ask us separately, because it is a more important question than this one.
Can I map SharePoint as a network drive instead?
Please do not. It is unsupported, it breaks whenever sign-in tokens expire, it has no offline behaviour and it loses files. A shortcut gives you the drive letter experience without any of that. If something you use genuinely needs a fixed path, tell us what it is and we will find a proper way round it.
Why can a colleague see the Add shortcut button when I cannot?
Most often because you are a guest in that Microsoft 365 rather than a member of it, and the option is only available to internal accounts. It can also be because you already have that library synced. Send us a screenshot and we will tell you which.
What happens to my shortcuts when I leave?
Nothing happens to the files. Shortcuts are pointers held in your OneDrive, so when the account goes the pointers go with it and every file stays exactly where it was, in the SharePoint site it always lived in. That is precisely why shared work should not sit in an individual’s OneDrive.
How many files is too many?
Microsoft’s guidance is to keep the total under about 300,000 items across everything you sync, including your own OneDrive. Most people are nowhere near. If you are syncing two or three whole libraries and your computer has slowed to a crawl, you may well be, and switching to shortcuts on the folders you actually use will fix it.
Does any of this work on a phone?
Shortcuts do. They appear in the OneDrive app on iPhone and Android automatically, because they belong to your account rather than to a computer. Synced libraries do not, since sync is a desktop idea. One more reason to prefer shortcuts.
Getting help
If files have stopped syncing, or something has vanished that should not have, tell us the same day rather than working around it. Almost everything here is recoverable while it is recent. Send us what the OneDrive icon says and which library it is, and we will take it from there.