Very fair point. But what you could do is, as Bob says, make a brand new Time Machine BU with the 4TB, let that continue to BU incrementally for, say, 3 or 4 days - then Erase your 1TB and store your photos.I wanted to Keep the 1TB for photos
Not quite sure I understand your question; but if you mean that if you create a new Time Machine backup on the 4TB External Hard Drive (EHD), then the Backup (BU) starts there.Ian if I do that, how far back does this go?
That is NOT how it works. What you see in any given date folder is a collection of what are mostly links to the last time the file/folder changed. If you copy that link somewhere else and delete the Backups.Backupdb folder, you will end up with broken links and not many usable files. If you really want to know how backups work, start here: Time Machine: 1 How it works, or fails to – The Eclectic Light CompanyAll you need to do is go into Backups.backupdb/yourComputerName/ and you'll be presented with a set of folders named in yyyy-mm-dd-hhmmss format. Simply locate the most recent (or sort them - the most recent will be at the bottom, thanks to its name) and copy it elsewhere. You can then delete the Backups.backupdb folder or wipe the entire drive as you wish.