Currently, there is no way to access the Switch eMMC on the console itself, as its 'disabled' when using the 'fusée gelée' exploit, but thanks to scene developer @rajkosto, whom earlier released a payload called 'biskeydump', you can at least get your console unique BIS keys, and then using his latest release, HacDiskMount and a way to attach the eMMC removed from your Switch, or an NAND backup, you can now access it!
Allows to open Switch eMMC RawNand dumps (and physical devices) and lets you perform operations on the individual partitions within, such as dump/restore from file, or mount them as a drive letter in Windows (with transparent crypto performed provided you have your BIS keys).
Changes:
1.0.2.2 - Fix crypto not working correctly at all on CPUs without AES-NI
1.0.1.1 - Partial support for dumps on 4K physical sector drives