In the end, there are three options here:
1. ChkSkins full - all skins downloaded/uploaded, some 3700 at the moment, 40 GB
2. ChkSkins 4K - Limited to 1550 skins at the moment, 30GB
3. No ChkSkins
The idea was to easily share skins ... and that has been achieved. In mission, I see a lot more custom skins than before.
So, now remind me, where the problem is?
If you think your free disk space gets too low, by all means, delete some, and do not run ChkSkins any more.