--backup-dir making copy even though no change

[Animosity022]

See:

Can't mount '.heic' (photo-video) files from onedrive

@asdffdsa Good question, I guess the answer is yes. @Andrew_Xxx: It looks like the files are Live Photos uploaded from the iOS OneDrive App. If so, then the issue is most likely due to OneDrive’s partial support of Live Photos. Upload and storage from the iOS app were introduced in December 2020. The remaining implementation is still work-in-progress and this introduces some “surprising” situations when mounting and synchronizing - also in the native OneDrive client on Windows. The issue(s) …