after you deposit the first 800k (coming from outside Thailand), same procedure. You start after 90 day the 2nd year for Non O-A (800k 2 months before and 3 months after extension and then not under 400k). I have a second deposit account with 800k and dont touch it. I use my saving accounts for virements and transfer of THB from my home country.
you need only show the requirement of 800k 2 months before first extension for 1 year. For the second year, you need to show not less than 800k during 3 months after 1 year extension, not under 400k after and 800k 2 months before 2nd extension. (This is for a visa non O-A outside Thailand).
The money you use to live, you could transfer at your wish.
it's to avoid doing the 90 report and especially to enter just some days before my Non O-A Visa exempt (get another year with a new 1 year medical insurance certificate)