Hello,

If you are a developer, check out this plugin I made: github.com/afonic/rimage-k2

It offers much better image handling, multiple image sets, and it splits the generated images in folders for each item so it's nice and tidy.

Plus, you can now reorder galleries!

I'm not so much worried about the cache folder, more about the src folder which keeps a copy of all the original files uploaded. Since our authors don't really care about file size of the files they upload, with the knowledge K2 resizes all images in smaller sizes, they tend to upload huge files. Thus the src folder keeps growing in megabytes and takes a huge amount of my server storage. I need to clear this folder regularly via FTP, if I don't want to be billed by my hosting company for extra storage.