too many attachemnts?

[twosaturns]

sorry if this has been answered, I couldn't find it in FAQs:
when I tried to 'manage attachments' to add pictures to a post, it said I had used up my alloted space. that's cool, but do I ever get more space? the only way I was able to add updated project pictures was to delete previous ones, now the thread doesn't make sense.
I also tried to put some pictures in 'my PT garage', but the screen just goes blank; nothing happens.
thanks!
Keith