This PC's drive is full (E-AGENT-003)
A backup keeps a few working files on this PC while it runs. When that drive fills up, the run stops: what it means, why it is not the destination, and what to free.
This PC's drive C: is full. (E-AGENT-003) means the backup ran out of room on this PC, not on the destination. Your destination and your earlier backups are fine.
Why a backup needs room on this PC#
While it runs, a backup keeps a few working files on the drive where GBM AI keeps its data (usually C:):
- the list of what it has copied so far;
- the new set's index, before it goes to the destination;
- the index that spots files it has already stored;
- for a cloud job, its local copy and packs before they are uploaded.
They are removed when the run ends. A job with millions of files needs a few gigabytes for them.
If the drive has less than 2 GB free when a backup starts, GBM AI builds these files on the destination instead, and says so in the run's log. So E-AGENT-003 means the drive filled up during the run: a very large job, or another program filling the drive at the same time.
What to do#
- In the run report, click Open Storage settings. It opens Windows Settings ▸ System ▸ Storage.
- Free at least 2 GB on the drive the message names. Storage Sense, temporary files, the Recycle Bin and the Downloads folder are the usual places.
- Run the job again. An incremental or differential job carries on from its last complete backup.
Retention does not run after a backup that stopped this way, so no older set was removed.
Not the destination#
Not enough space on the destination. (E-DEST-002) is the other one: the backup drive, share or bucket is full. Free space there, choose another destination, or keep fewer sets. See Error codes.