Hacking Unlinked nands vs linked nands?

[Pikasack]

I just want to know the differences and advantages and disadvantages of having your sysnand and emunand either linked or unlinked.

And is it possible to upgrade your emunand without your sysnand upgrading too when they are linked?

I just want to know once I start setting this all up for a friend. (Who hasn't updated since 4.5! Im jealous!)

 

[Mochiman123]

The primary difference is launching DSi games installed in sysnand and being able to launch them in emunand without installing them on both nands like you normally would have to. Linked nands mean that they both read and write data to the same folder on your SD card which can cause things such as CIAs installed on emunand showing up as presents on sysnand and entering data management on sysnand will wipe all of your emunand data. Also, it is possible to upgrade your emunand when your nands are linked. I'd personally recommend unlinking them.

Edit: This is all explained in the savedata/emunand guide sticky...