XF 2.1 Very large attachments folder in data folder

Dubbed Navigator

Active member

I have recently had a warning regarding disk usage. I have found various areas that are to blame for this, however one did surprise me.

The data/attachments folder is several GB in size (around 5GB). I have been downloading a large amount of hot linked images so the size isnt such a surprise, but this is also about the same in internal_data/attachments (where I would expect it to be)

Any idea what may be causing this?