I have an older Nintendo Wii that I would like to sell. Before I can list it, I'd like to include how much memory the console has. I searched Nintendo support and they said I could see this under Data Management. However, when I go into that area, where the installed games are shown, I see "693 Blocks". What does that mean? Is there a different way I should use to determine how much memory the console has?
Blocks was how Nintendo measured data for a while. There are calculators online like this one: https://nblocksconverter.herokuapp.com/mobile that show you that 1 block equals 0.125 MB.
Your unit doesn't have 1GB of RAM (as you assumed in your comment).
Every Wii has 512 MB of storage on a flash chip (some of which will be in use by the system itself) and 88 MB of RAM (24 MB fast 1T-SRAM and 64 MB slower GDDR3 SDRAM).
These 512 MB would equal to 4096 blocks. Your 693 blocks would then be equal to 86MB (1 block = 0.125 MB).