Hi Rod,
I think there are ways to restore previous versions of files, but I do not think it's possible to do so from within the client without Version Tracking turned on for the relevant repo or entry.
Here are some links to other posts on the topic:
https://answers.laserfiche.com/questions/48411/Restore-a-backup
https://answers.laserfiche.com/questions/55213/Laserfiche-Restore-Process
The first reply on this post:
https://answers.laserfiche.com/questions/68508/Versioning
explains that "Laserfiche volumes house images and electronic documents, and within the volumes new versions of a document are kept as separate files linked together based on references in the database", so assuming each version is the same size, you'd scale accord to the number of versions (ie, 2 versions = twice as much space required, etc.).
~Rob