router IOS installation via USB

[samith_me]

I have a 1921 router with c1900-universalk9-mz.SPA.154-3.M3.bin

I need to downgrade IOS to c1900-universalk9-mz.SPA.153-3.M5.bin via using USB dive. when I am coping IOS to Flash has error as per below

Router#copy usbflash0:c1900-universalk9-mz.SPA.153-3.M5.bin flash:

Destination filename [c1900-universalk9-mz.SPA.153-3.M5.bin]?

%Error copying usbflash0:c1900-universalk9-mz.SPA.153-3.M5.bin (destination path is identical)

what can be the reason for this. please help

[Mark Malone]

Hi

Is that version already in flash check flash with command dir see if its already listed there ?

[samith_me]

Show Flash Has attached

[Leo Laohoo]

copy usbflash0:c1900-universalk9-mz.SPA.153-3.M5.bin flash0:

[samith_me]

flash0  is invalid Input