Yes. Always. About 60Gb. Maybe it's the Client but I don't think this will solve the problem but I will try soulseekQt.

Edit: Wow. I think this was the solution! With the OG Soulseek Client every request is downloading within seconds! The Client looks a little bit out of date, but if it works, I don't mind. Surprisingly I get some bot messages every few request to prove I'm human. I never got these kind of messages with Nicotine+. Thank you very much!