Having just purchased a PicoDivSD from Zaxon on Sellmyretro.com I was trying it out with some demos. It is amazing what the old Speccy is capable of when pushed.
The PicoDivSD looks like this in the Spectrum +2A
as you can see it’s very compact, and barely adds to the Spectrum footprint at all. The hardest part of using it is setting up the SD card with some files, after that plug it in and hit the button to load the menu, choose a game, utility or demo and you’re playing instantly.
And your Spectrum could be doing this