Memory card format problem

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http://www.linuxquestions.org – Hi there, I installed Ubuntu USB boot to a microSD card and it worked fine, now I need the card for something else so I formatted it to Fat32 with Gparted, the formatting went smooth, but when I copy files to the card it said disk full, and I still see all the old files in there, the card is not actually formatted ! I then format it to Ext4 but the same result, I then formatted it again to Fat32 via Windows, but still the same result, what is going on here !?!? (HowTos)