to set up the dsone i i suggest to download the evo "eos" operating system from supercard.sc download.
download updateen and usercheat.dat from supercard if u can find it... if now usercheat.dat (largest file newest update) from gba temp download aka filetrip will work
insert micro sd card into card reader
(note words on card facing up and words on reader face up)
make sure card is format in fat, fat 16 ( best) or fat 32
drag and drop the dsone file to the micro sd card
drag and drop the updateen to the micro sd card
drag and drop the usrcheat.dat file into the dsone file on the micro sd card
(note at any point now or after update, roms can be added to micro sd card)
close micro sd card window
remove card reader from pc, remove card from reader
put micro sd card into ds onei
put dsonei into the usb updater (used to supply power to onboard chip to "flash" the cart i think)
insert updater/supercard/sdcard combo into usb port
wait about 8 minutes
lite is green... card is clean. ready to go
lite is red... card still dead
i made one succesful attempt using the instructions that came with the card with the original (old) os
i made 4 unsuccessful attempts until i added the updateen file to micro sd, thenone sucessful attempt loading the evo os
(note if upgrading it is suggested to backup any game saves and delting the old os files)
(note 'os' is short for operating system aka 'gui' short for graphic user interface)
(note updateen file is necessary for both operating systems hence the word update... i guess is the source code for the usb updater it took me forever to figure that out as it wasnt stated in the install instructions on superards website)