The size is 11 GB

If the data wasn't important, i would'nt ask you guy's, right ?

Thanks, now it works, by bad...

But it say's "TheBackup is valid" but when i try to restore it, it tels me that:

An internal consistency error occured.Contact Technical support for assistance....

is it not posible to check a backup file from a tool or something like that ?

Hi again...

Now it's

Server: Msg 3206, Level 16, State 1, Line 1

No entry in sysdevices for backup device 'f:\cp.bak'. Update sysdevices and rerun statement.

Server: Msg 3013, Level 16, State 1, Line...

HI

Thank for fast response.

When i do

RESTORE VERIFYONLY FROM f:\cp.bak

It say's

Server: Msg 170, Level 15, State 1, Line 1

Line 1: Incorrect syntax near 'f:'.

Where should i run it? from the query...

How do i check a backup file?