disk space

Hello, I've a problem with the disk space used by xenforo. Internal_data folder is 12GB. Can this be a normal size for a forum with 900'000 messages? We can't change server/upgrade disk space, so I have to try to limit the size of this folder. Any idea? Thanks.

Support lossless/lossy image size optimization scripts in the core. In this way images uploaded (and "imported" from the image proxy) will be auto optimized to save disk space, bandwidth and to speedup the download from the members/visitors. p.s. I know an addons already exists... but this is...