Hacking EmuMMC system memory is 168MB.

[digicube]

How do I increase it? 128GB microsd. Unpatched V1 switch. 12.1 firmware. Atmosphere 1.1, latest hekate and sigpatches.
I followed NH Switch Guide to create emuMMC.
https://nh-server.github.io/switch-guide/user_guide/emummc/making_emummc/
In partition manager, how much should I allocate to FAT32, RAW, EXT4, USER? I think I have 115GB FAT32, 4GB emuMMC, OGB EXT4, USER.

 

[Vid]

29gb when creating your emuMMC

 

[digicube]

Can I make a backup of microsd, create a new SD partition and copy the backup back onto the microsd?

 

[Vid]

Can I make a backup of microsd, create a new SD partition and copy the backup back onto the microsd?

Yes but I usually just do clean AMS install.

 

[Draxzelex]

Can I make a backup of microsd, create a new SD partition and copy the backup back onto the microsd?

You should be able to.