Since Veeam v10, NAS backup has supported file-level backup. However, when backing up a share with >2.1 billion files or folders (theoretically possible on huge Isilon or NetApp clusters), internal counters for metadata enumeration overflow.

Automate this script in SQL Server Agent:

Where does such a large number come from in backups? Two common sources:

Unlike a simple permission denial or connectivity timeout, an overflow error in Veeam typically indicates a low-level arithmetic, memory buffer, or data type constraint issue. If left unresolved, it can halt backup jobs, corrupt catalog files, or crash the Veeam console entirely.