2GB HP pendrive TDMG12C4M2GB083100325. My HP pen drive had key lock feature to create a secured

Question

My HP pen drive had key lock feature to create a secured area & a common area for user While copiing some pics from my friend PC (already virus protected), it developed some snag and now Pen drive only shows 356MB space (common area) instead 2GB. Even after formating this device, it's showing the 356MB space. Moreover keylock icon has also dispperaed. Pls Advise what to do..