Scene developer @rajkosto has recently updated his 'HacDiskMount' app that allows you to explore your Switch eMMC NAND dumps.
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:
1.0.3.3 (29.05.2018) - Fix crash in open physical disk if there's a removable drive with no media
1.0.2.2 (30.04.2018) - Fix crypto not working correctly at all on CPUs without AES-NI
1.0.1.1 (30.04.2018) - Partial support for dumps on 4K physical sector drives