>>35271044.82 Gb.
The easiest solution is to spend some time registering new Dropbox account using the ref link from pastebin. It'll add some space. If you want to maintain your archive yourself, you'll need to periodically update the entire archive, because I replace some old pictures with better quality versions every time adding a new thread.
Tbh the only reason to still use dropbox is because one anon said that he had problems accessing the MEGA. But it was more than 2 (3?) years ago. Maybe we just should use only MEGA for now? It has more than enough free space.