Ok thanks for the help!
I found part 2, 3 and 4 in my trash bin which were all 200MB large, so I only had to download 1 % 5. As you thought, it was probably since I downloaded all the files at the same time.

Ok thx, that's probably the problem, i download them at the same time

Yeah, that makes sense

Where do you download rusmap from, so I know it's working (even though according to the replies, the promods thread is working)

forgot the screenshot

I'll try reinstalling 7-zip

Here are the sizes

Yes, tried Winrar, 7zip, repairing using winrar

Do you want a screenshot of the winrar results?

I also now because of this tried with the 5 already downloaded Rusmap rar-files. It only says the model 1 is corrupted, but it gave me that 330MB file.

(edit - added "file")

Ok, just noticed this, this time it gave me a completely empty .scs file.

"
2 Data error in "RusMap-model_v1.7.1.scs". The file is corrupt
"

Well, I have enough space on my hard drive, I'm downloading via chrome (if that helps), maybe something with 7-zip? Does it need an update (I have promods, balkan & a lot of other mods which I had no problems extracting)

Ok, any ideas why? I started downloading part 3 again when I started this thread (from a different website) to see if something would change.