That’s not the whole story…
The Roon backup comprises of two main folders:
- …\RoonBackups<backup id>\backups
- …\RoonBackups<backup id>\objects
The backups folder contains time stamped files that describe how to restore the data from the objects folder, to be able to restore the Roon DB to a given point in time.
The objects folder contains the actual data that is required to be restored. This includes everything that is in the Roon DB, so that upon restore nothing has to be re-downloaded from the cloud servers and no user edits / preferences / list / etc. are lost (hence its significant size).
When Roon creates the first backup, the object folder is populated from scratch, this take a while … and a backup file is created to document it.
Then with the subsequent backups only the differences have to be written into the objects folder [incremental] together with another [time stamped] backup file to document it.
Hope this helps.