I play on a laptop with 27.8 GB hard drive, and I am forced to uninstall and reinstall (back up skin folder too) after osu! reaches around ~1500 of them to prevent my space from reaching limits. Can't exactly just delete the beatmaps alone since they mess up the entire game for some odd reason, so uh- I wouldn't be all that surprised if it happened to me on the spot- just confused. Will just take around 5 minutes reinstalling osu! again and stalking multiplayer rooms just for beatmaps.
uhhh i mean i'd play a better rhythm game like elite beat agents hurr durr