What is the problem you are having with rclone?
The --max-backlog documentation here does not mention what the default value is or where it is inherited from.
There are however forum posts (such as this) where a previously quoted page mentioned a default of 10000.
So it appears that between December 2019 and the release of v1.51 the documentation of --max-backlog omits mentioning defaults (if any).
Thanks!
