NOthing wrong with a SSD Drive just make sure it's big enough to do some good.
You do need a drive
Now what does she use it for? Storing photos, Surfing the web, Facebook et-al. ONLY
Consider a Chrome book
WHy
Cheaper
Though equally hackable it's easier to fix
I pop a 128Gig "hard card" (MIcro SD card) in the side and I can store .. A lot
IF the thing gets "Sick" (A virus) and I've had it happen.. POWER WASH less than 5 minutes and I'm brand new (Save for the data that's still on the card)
Also can run limited Linux software two different ways but that's more for you than her
Very basic "Text Pad" can be added as well as all the major apps like LastPass, Swagbuchs, Honey Speil clunk..er, spell check. and more Also runs many android apps.
All in a box where you get major change back from $200