PlayStation 2 + FileZilla - Upload Speed maximal 15 kb/sec with SONY HDD Adapter

Hello.

I have reading many threads about Upload speeds with the Sony HDD Adapters and the Upload Speed with FTP is NOT great at all.
I see about 40-50 kb/sec. is the average one.

I use FileZilla v3.43.0 and Windows 7 Pro 32bit.The PlayStation 2 and PC are connected directly.With a Router it is not possible for spatial reason.
If I set it higher than 15-18 Kb/sec. then the PlayStation 2 freezes on LaunchELF 4.43a (in the meantime I have tried many Versions of (u)LaunchELF,no change).

To...

PlayStation 2 + FileZilla - Upload Speed maximal 15 kb/sec with SONY HDD Adapter