Hi
First of all thank you to the dev(s) for such an outstanding piece of software 
I have an odd problem though with uploading to Amazon Drive
rclone -vv copy /home/roon remote:Roon backs up the contents of /roon as expected
but if I run the command again I get
amazon drive root 'Roon': Modify window not supported
rclone -vv copy /home/NKL remote:Music again backs up /NKL as expected
but when I repeat that command, rclone behaves as I expect and uploads only new content
The question I have is why does Amazon/rclone treat one folder as modifiable, the other not?
In each case the folders did not exist on Amazon before I ran the rclone command for the first time

Many thanks for any help
/neill