Hi Mattias,
Please log in to your OneDrive account at this link:
https://onedrive.live.com/
See if the files are intact under the "My files" section.
Also, check the Recycle Bin in OneDrive.

If the files are missing in the OneDrive Recycle bin, try restoring from shadow copy if possible.
Download System Restore Explorer | Nic's Blog:
https://www.nicbedford.uk/software/systemrestor...
Run System Restore Explorer and see if restore points were created before the problem was noticed. If so, mount one of those restore points (a.k.a, shadow copies) to see if you can recover them.
(If there are no restore points or shadow copies, this method won't help.)
You can also try Recuva from Piriform.com or EaseUS.
Download Recuva | Recover deleted files, free!:
https://www.ccleaner.com/recuva
EaseUS Free Data Recovery Software for PC [2025 Updated] - EaseUS:
https://www.easeus.com/datarecoverywizard/free-...
(There is a free version of the above software with a 2 GB recovery limitation.)
Standard Disclaimer: There is a link to a non-Microsoft website. The page appears to provide accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as PUPs (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.