how do i change save setting on a R4 (clone i think) but pretty sure

i have a r4 III revolution upgrade and for certin games i get save data cannot be accessed, how do i change the save settings. i have looked at previous posts about arm 7 and all that and did not understand any of it.please help,from an idiot :Pthanks

changing the backup media type only applies to emulators. For a flashcart you need to arm7 patch the rom.

hi looneylion did all that and i got a pat file but still does not work, same error. saw this in a link(It created a .PAT file which was identical to said .nds in terms of file name (ie. Metal Slug 7.PAT) but not size (should be 1kb).
I patched the file while it was on the DS-X so there was no need to copy anything over.
The .PAT file was present in my "apps/metal slug 7/" folder after patching.
I forced the EEPROM to save (loaded up CV: POR, saved, switched off then turned it back on) and it was done)where do i go from here and how

https://www.romulation.org/forum/index.php?topic=1462.0