Exclude specific file types or large files from OneDrive syncing

Solution 1:

OneDrive added this feature a short while ago. Well somewhat. If you are using the OneDrive insider preview you can do this:

Copy %LOCALAPPDATA%\Microsoft\OneDrive\{OneDriveVersion}\adm OneDrive.adml (language file) to C:\Windows\PolicyDefinitions\en-US and the OneDrive.admx to C:\Windows\PolicyDefinitions.

Then in the Group Policy Editor (gpedit.msc) go to Computer Configuration -> Administrative Templates -> All Settings and find Exclude specific kinds of files from being uploaded. Now there you can specify specific file types or file names to ignore.

See also https://senpai.club/exclude-file-types/ and https://techcommunity.microsoft.com/t5/microsoft-onedrive-blog/celebrating-the-top-onedrive-moments-from-microsoft-ignite-2020/ba-p/1679821