DRM protected eBook used by VitalSource Bookshelf, an eBook application used for reading purchased textbooks; may contain a digital textbook created by one of many different publishers; requires a VitalSource Bookshelf account as well as the software client to open.
The VitalSource Bookshelf software also allows users to access digital copies of textbooks you own in print.
Backup file created by Veeam virtual machine (VM) backup and recovery software; contains a full recovery backup of the VM and is the largest of the files created for any backup; allows a full restore of the state of the machine when it was last backed up.
VBK files differ from .VRB files, which contain incremental backup changes since the time of the full backup.
NOTE: VBK files can be very large (many gigabytes in size). For this reason, they are often backed up to low-cost storage devices such as tape backups.