What happens if my internet is cut or I stop a file transfer midway while syncing with Dropbox?
Do I need to restart the whole thing? Or does it continue midway?
It depends on the action, if you're uploading a completely new file and the upload is suddenly interrupted, you're required to re-upload the entire file. If you're syncing files and the the sync is currently interrupted, you will only need to sync the parts of the file that have not been synced yet because Dropbox uses Delta Encoding technology:
I've been playing with this a bit and it seems to vary, sometimes I'm forced reupload the entire thing, sometimes it just resumes...