I recently asked about that in another thread. The way I have it figured is you can't. You can edit post that are less than two weeks old and remove attached files from threads but that isn't encouraged. Now as to clearing out that attachment space, my understanding is that you can't. I have no clue what the ceiling or limit is but there isn't a way to clean the uploaded files out. That is pretty much what I was told anyway.
Thank you again Nigel for clarification and I agree things would look ugly in older post with images removed. Additionally I figure if Hero999 can't break the bank then the bank can't be broken.
Upload space was limited to I don't know how many MB. I then had to remove attachments to be able to post new ones. (Average file size was about 10KB.)
Available space seems to have been increased by the site owner this year. I didn't have any problems attaching new pictures.
I offered promoting to the site to the owner (Electro Master) on another than the usual way (bank problems) but never received a response message, neither via PM nor by posting.
There are, as usual, two ways of interpretation:
1. The site owner has money enough to keep up the forum by own expenses.
2. The site owner doesn't care for the "peanuts" brought in by members.