@balaji.bandi, the problem looks related to OPs (I'm not OP but I'm sharing my findings here)
0019300STK01#dir flash:Directory of flash:/
No files in directory
11353194496 bytes total (8405921792 bytes free)
SWITCH#dir flash-4:Directory of flash-4:...
"Means someone has completely wiped the switch."In this case I'm not so sure, in the output provided by KMelton we can see that although no files are seen, the space is being used:
11353194496 bytes total (8405921792 bytes free)(almost 3GB used)I see...
