i have another 3DS with 7.1.0-16U
i format the SD card completely
i make the kids play with it , and i tuned off the wireless , apparently i didn't the wireless sitting
so i guess someone switch it on for some times, because today i switch it on and there is a message for new update available
so, i turned off the 3DS and got the SD card to see other files
when i gave the 3DS to the kids, they didn't play any 3ds or DS game , only the supercard with some games in it
this was inside the 3DS Folder in SD card
the path is like this :
Nintendo 3DS\0736d30a36e43a22eb8873f49daa4120\78b100b647074086534130380002544d\extdata\00000000\0000008f\00000000
i don't know if this update "8.0.0-18" or "7.2.0-17"
this was the only files in there
i format the SD card completely
i make the kids play with it , and i tuned off the wireless , apparently i didn't the wireless sitting
so i guess someone switch it on for some times, because today i switch it on and there is a message for new update available
so, i turned off the 3DS and got the SD card to see other files
when i gave the 3DS to the kids, they didn't play any 3ds or DS game , only the supercard with some games in it
this was inside the 3DS Folder in SD card
the path is like this :
Nintendo 3DS\0736d30a36e43a22eb8873f49daa4120\78b100b647074086534130380002544d\extdata\00000000\0000008f\00000000
i don't know if this update "8.0.0-18" or "7.2.0-17"
this was the only files in there