Again, do you think I'd come here complaining if I wouldn't have tried redownloading the mod at least half a dozen times already? I think using 7Zip for a .7z compressed file can be considered a default. There is nothing wrong with it, works perfectly for other stuff, if it says files are corrupted, then files are corrupted. And the size of the .7z file is no different after download from what Google Drive says about it before download.
In the meanwhile, have you fixed the issue you were talking about earlier? Or amidst all the real life you have to deal with you have time to think of possible errors on my end but not fix the one on yours, don't you?