FreeFileSync Forum

There are multiple files to sync, and it is still magnitudes slower than FTPS client. Huge performance difference. It took a little over an hour and a half for Filezilla to upload the same dataset that FFS needed almost 14 hours for.
Also the speed is slow, even on single thread setting.

It sounds ...

Besides "an FTPd", what I am FTPSing to is not relevant, since it is the same destination if I use FFS or Filezilla.

I already gave the comparison, the FTP client delivers expected speed for FTPS, which if you know FTPS is usually as fast as bandwidth will permit. FFS delivers very slowly in ...

FTPS, (NOT SFTP), transfers go very very slowly. It is unclear why.

I have tried leaving threads setting on default 1 and also moved it up to 10, does not matter, transfers are very slow.

When I use an FTP client, like Filezilla, the transfers occur at the fast speed expected by FTPS transfers.