Flash0 dont show any files Cisco3945

[RICARDO SANCHEZ]

Hello

I have a router 3945, version 151-2.T2, the dir command dont show any file in flash0,

The total is 4186591232 and free 4067074048, this indicate that something unknow is using that bytes.

R01IPMONSLA#dir
Directory of flash0:/

No files in directory

4186591232 bytes total (4067074048 bytes free)

Does anybody knows about this behaviour?and how can try to fix this?, there were not changes recently

Thanks for your help

[Leo Laohoo]

I know what this is.  This is a third-party CF isn't it? 

Some third-party CF contains an auto-execute, proprietary software that are hidden. 

If this is indeed a third-party CF, then use the router to format the CF.