Talking of memory, a lot of cheap SD and memory sticks these days may not be the capacity they claim, but you won't find out for a year or two. Plug them in and they report a capacity, but now there is a lot of computing going on inside to cycle block usage and it is not that difficult to fix the reportage to say anything.
eg I have a 1Tb memory stick that tops out at 29Mb, it cost about 1GBP more than a 32Mb stick. But it is all  red  so I got what I wanted!