In Veeam Backup & Replication, an "overflow" error usually refers to Snapshot Overflow Arithmetic Overflow
This often only affects the visual charts in the console and may not stop the actual backup job. veeam backup and replication overflow error
If you see an error referencing System.Drawing.Graphics.CheckErrorStatus , it is often a visual bug rather than a backup failure. In Veeam Backup & Replication, an "overflow" error
Review logs located in C:\ProgramData\Veeam\Backup on the VBR server for specific error strings. In Veeam Backup & Replication
: If using SQL Express, migrate the configuration database to a full version of SQL Server or Veeam's PostgreSQL-based engine (introduced in v12) to remove the 10 GB limit.
(if confident)
A specific error can occur where S3 object storage repositories face "overflow with small metadata files of 0 kb".