Hello @Julian,
+1 for backing up to a tarfile first. If you don’t have the local disk space for that, consider using something rpipe to pipe the tar directly to your ACD remote.
I’ve had some (truly bad) experience with Amazon when trying to backup local directories directly (file name length restrictions, banning/bottlenecking on my transfers, etc). And to top it off, it seems rclone itself does not work very well when you are backing up a large quantity of relatively small files (for example, even to GDrive which has much less issues than ACD, I still haven’t managed to backup and verify my 7M files / 5GBytes local server dir tree – latest issue here, but not by any means the only I’m struggling against).
rclone works wonderfully for small-and-medium-sized trees of relatively large files, but for large trees of relatively small files, it’s simply not there yet IME.
Cheers,
Durval.