rsync seems to overwrite already existing file on ExFat

I have a curious behavior from rsync between two hard drives containing the exact same four partitions. However on one partition rsync seems to always copy again the files, I don't understand why.

rsync -r --update --progress "/media/part3/" "/media/part3_backup" --exclude '.Spotlight-V100'  --exclude '.fseventsd'  --exclude '.Trashes'  --exclude '._.Trashes'  --exclude '.TemporaryItems'  --exclude '._.TemporaryItems'  --delete

Any explanation is welcome.

Solution 1:

I had the same problem using rsync -avx from ext4 to exfat. It was copying files over all the time. -avx was not preserving the times and giving me a Operation not permitted (1) error.

This worked for me

rsync -rtv [source] [destination]

Explanation:

• r: recursive
• t: preserve times
• v: verbose

You have to make sure that the times are preserved.