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Could you please tell us which version of OneDrive did you use?
Such as OneDrive for Mac, OneDrive for Windows.
Please go to OneDrive online first, check whether there are files you need. If so, please try following suggestions to have a check.
> Now that I unsynced, I find none of my files are on my device. I need them back.
How did you unsyc files? Such as Pause and resume sync in OneDrive, Unlink OneDrive. For more please refer to "Turn off, disable, or uninstall OneDrive".
If you unlinked the account, I would suggest you add this account back, but disable "Files on Demand" feature.
- For Windows, please refer to “Save disk space with OneDrive Files On-Demand for Windows 10”
- For Mac, please refer to "Save disk space with OneDrive Files On-Demand for Mac".
Then, please check whether your files go back to local OneDrive folder, if yes, you can move these files to other local folders.
If not, those files are not available on OneDrive online, then I would suggest you go to Recycle bin on OneDrive online, try to restore deleted files or folders in OneDrive.
If you have Microsoft 365 subscriptions, you can even restore your OneDrive.
When you need to close OneDrive, you can unlink your account again.
Any updates, you can let us know.
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