Gaming Backup/Restore Eshop AC:NL Save

Brewzip

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Hi! I have some games bought from the eShop and I would like to backup their saves.
Some games has the Backup options in the Home menù, some like Animal Crossing doesn't, maybe because of card2 save type.
I would like to backup/restore that game save to enhance my gaming experience, for help me find the mover villager.

Reading some guide dedicated to emuNAND construction, I understood that copying the entire SD to PC, formatting emuNAND and then putting the content back to SD will not alter the game and the saves.
I don't own any 3DS flashcard, so this is not my case and I can't use SaveDataFiler... but I would like to know more info about the copy/paste method, if in beetween the backup/restoration I play with some games.

So, if I follow these steps:
  1. Copying all SD content to PC (backup)
  2. Play the game and save (obliviously the SD content will change)
  3. Restore the SD content from PC in step 1 (restore)
Will it work, or I risk to mess up my games and saves, for some reason (eg: anti save-duping things)?
Someone has just tried it? Thank you for the help! :)
 

Brewzip

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I've done more research. Animal Crossing seems to be one of the few games implementing the "Anti Samegave Restore" http://3dbrew.org/wiki/Anti_Savegame_Restore
If found this recent topic, where this anti-restore technology was triggered injecting a save. https://gbatemp.net/threads/error-injecting-ac-nl-savefile.380587/

So, I thinked about another routine.
  1. Copying all SD content to PC (backup-first)
  2. Play the game and save (obliviously the SD content will change)
  3. Copying all SD content to PC (backup-second)
  4. Restore "backup-first" to the SD
  5. Play the game. If the anti-restore trigger, continue the list, otherwise stop
  6. Restore "backup-second" to the SD
  7. Play the game
Surely the routine won't stop at step 5 (non triggering the anti-restore), but I am worried about a thing.
If it trigger at that step, will it save some data again? If so, it will make even the "backup-second" data invalid...
What do you think?
 

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