I even store a couple of factory complex as blue print to move base easily.
Anyway, couple of tips using foreman.
Foreman can sort alphabetically on import, but let's say you want to re-arrange the blueprint by renaming them.
But after you renaming them, the order was still the same, all you have to do is forced Foreman to re-arranged with mass load/import.
- Do mass export, it will give you the file defaultBook.lua (located in %AppData%\Roaming\Factorio\script-output\blueprints)
Replace the defaultBook.lua inside Foreman zip.
Do mass load, then you will have the blueprint you renamed earlier being auto sort alphabetically.