Libraries are best kept on a separate drive from the program drive; if your computer has a least USB3 then you can use an external USB3 SSD which will also be able to stream the samples without problems.
You don’t need a DAW to use plug-ins as there are a number of VST Hosts out there that can host them, however if you already have a DAW that can host them, then it is pointless adding extra complications.

Bill
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English Riviera:
Live entertainment, Real Ale, Great Scenery, Great Beaches, why would anyone want to live anywhere else (I�m definitely staying put).