Utility to go to native backup

Greetings,

We are having an issue with restoring a database using version 5.3 and getting the following error;

Thread 0 error:
EOF#2 validation failed. Device 1. Expected 274726, available 67596.

Thread 1 error:
EOF#2 validation failed. Device 1. Expected 274726, available 67596.

Thread 2 error:
EOF#2 validation failed. Device 1. Expected 274726, available 67596.

SQL error 3013: SQL error 3013: RESTORE DATABASE is terminating abnormally.
SQL error 3203: SQL error 3203: Read on "SQLBACKUP_EB07206A-02FD-435F-A6C0-7A4739C91EBA02" failed: 995(The I/O operation has been aborted because of either a thread exit or an application request.)

SQL Backup exit code: 790
SQL error code: 3203


Wondering if there is a way that we can either get the meaning of this error or better yet, convert this backup to native format so that we can do a native restore and work through the errors that way. Any information you can provide would be greatly appreciated.

Thanks.

David