Critical backup failure during data transfer (Agent Export error occurred mid transfer) Print

Run the below commands:(As an administrator:

• vssadmin Add ShadowStorage /For=C: /On=C: /MaxSize=UNBOUNDED
• vssadmin create shadow /for=C:

Then Delete the C: drive Data set from the portal

go to protect Tab > Configure Agent Setting  >  volume Level Backup Control  > delete the C data set.

Start Backup

or:

1. Expand Shadow Copy Storage:

   • Open Command Prompt as Administrator and run:

     vssadmin resize shadowstorage /for=C: /on=C: /maxsize=UNBOUNDED
     vssadmin resize shadowstorage /for=D: /on=D: /maxsize=UNBOUNDED

   • This ensures VSS has enough space.
2. Clear Existing VSS Snapshots:

   • Run:

     vssadmin delete shadows /all
     
     Then: 

     Delete the C: drive Data set from the portal

     go to protect Tab > Configure Agent Setting  >  volume Level Backup Control  > delete the C data set.

     Start Backup