There are 2 file types use the .NBD file extension:
1. Data Backup Data File

- Developer Prosoft Engineering
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Popularity
- Category Backup Files
- Format Binary
Backup file created by Data Backup Windows backup software; may include user and system files; uses compression to reduce the file size; may be created manually by the user in Data Backup or from a .NBK backup job.
Prosoft Engineering Data Backup PC has been discontinued.
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Updated: May 14, 2016
2. NovaBACKUP File

- Developer NovaStor
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Popularity
- Category Backup Files
- Format Binary
Backup file format introduced with version 10 of NovaBACKUP, a backup and restore utility for Windows; saves the backup data for the backup job, which can include user and system files; saved in a compressed format and can only be opened by NovaBACKUP.
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Updated: April 27, 2011