Hi, Viren Pasad
If OneDrive has not synced for 2 months even after reinstalling, the problem may not be the app installation itself. It can be caused by a stuck sync database, one bad file, storage issue, old sync client, or a network/account connection problem.
Besides the solutions provided by the Q&A Assist, here are some suggestions you can try:
First, sign in to OneDrive on the web and check whether your files are visible there. If they are visible online, your data is likely safe and the problem is mainly with the PC sync client. Also check that your OneDrive storage and your PC drive both still have free space.
Next, try a full OneDrive reset, not just quit or reinstall. Press Windows + R, paste this command, then press Enter:
%localappdata%\Microsoft\OneDrive\onedrive.exe /reset
If OneDrive does not open again by itself, search for OneDrive from the Start menu and open it manually. This does not delete your cloud files, but it rebuilds the local sync settings.
After that, select the OneDrive cloud icon near the clock and check View sync problems. If it shows a specific file, move that file out of the OneDrive folder temporarily. Large ZIP/video files, Outlook PST/OST files, hidden temporary files, very long file paths, or special characters in filenames can keep sync stuck.
If this is a work or school OneDrive connected to SharePoint, it is recommended that you also clear the old Office Upload Center cache if that app exists on your PC, then try syncing again.
Finally, test once using a different network, such as a mobile hotspot, and disconnect any VPN/proxy during the test. Also make sure Windows and OneDrive are fully updated. If you see the old OneDrive for Business sync app, the newer OneDrive sync client should be used instead.
Thank you for your patience in reading, I hope this information has been helpful to you.
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