I wasn't being snippy or sarcastic. I seriously don't know exactly how direct attachments work, as you'll often run into errors even when you meet the 'allowed file types' and 'restrictions' listed. Like your error: how could your folder be full when you hadn't even posted any pics yet? It's nonsensical errors like that that made me give up and advocate using external hosts years ago.
As for your question about your folder: there aren't any that I can see in my personal profile, others' profiles, or in the admin only areas. Perhaps only Mr. Nanto can see 'em.
edit - I did find a list of attachments under your profile ('show posts', then click on 'attachments') but there's only one in there and it's a mere 33kb. Surely that one little pic isn't enough to fill your folder, so I don't know what advice to give.