MS SQL Server backup to AWS S3 bucket mounted by rclone

[Gordon_Kao]

I could not find useful information about this error.

I also found the similar topic from this forum as below

Microsoft SQL fails to create Backup inside Directory

That bug report seems to indicate that it is to do with the Mount Manager and maybe rclone is discarding the special path \\.\S - you don't seem to be using that path in the example above though? Something you could try is mounting it on a directory instead of a drive letter, so instead of S: choose an existing but empty directory say C:\gdrive and use that instead of S: If that doesn't work we'll have to call in the experts - @albertony is good at Windows file systems.

but I don't know how the author made it possible to back up the database to the root of the S3 bucket...