These rsync options are useful to sync with an ExFAT drive:

rsync -vrltD --progress --stats /source/a/ /dest/a

-vrltD

options from -a friendly with EXFAT.

non-ExFAT rsync

If one uses the standard rsync options like:

rsync -a

they don’t work with an EXFAT drive. You’ll get errors like:

rsync: mkstemp … failed: Function not implemented (38)

because EXFAT doesn’t understand permissions, owners, or groups.

rsync progress indicator

In general, rsync progress can be observed on a per-file basis using commands starting with:

rsync -av --progress

Overall rsync progress can be observed by:

rsync -a --info=progress2