I used 8gb
I bought a few of these from 7DayShop on Ebay a few days ago and they arrived today, pretty quick service.
Neither the brand (who the heck are “Oscoo”? It sounds like some random Chinese thing.) or the retailer would inspire confidence in me.
I think you’d be mad to chance this thing over the likes of Adata or Kingston drives from more familiar retailers such as 7dayshop or Amazon as discussed all throughout this thread.
Amazon did sell Oscoo SSD's and the reviews look good. At that price range there's not too much risk. I find the Zapals site to be very reliable but delivery is usually 3 weeks or so.
The Kingston 120GB A400 is currently £18.99 (via code: id5mm) on Mymemory with free shipping
Code has expired, but still excellent value.