If you're waiting for updates to ninfs on this resource page, you should check out the alpha releases on GitHub. This resource will be updated once a new stable release is out.
Each part is expected to end in two digits (e.g. rawnand.bin.00, rawnand.bin.01, ...). Any part can be selected, the program will search for all parts starting with 00.
The command line argument -S or --split-files is used for a split backup.
The GUI will attempt to automatically detect this based on the filename.
GUI: Automatically detect Nintendo DSi NAND backups
GUI: Fix oversight breaking automatic detection of Nintendo 3DS NAND backups
ExeFS: Always show code-decompressed.bin, even if .code is not compressed
What's really cool about Pi's tho is you can have multiple SD cards with different OS on each SD card and change from say a gaming machine to a full fledged pc if wanted
Again you get what you pay for, its like buying a S series for $300 but its only 1440p native, if you want true 4k, gotta get the X model for $500. But yea you right, when moms buying it anyways, you gotta stay cheap.
I here ya there, I have too many myself, and have hard time letting them go, since most of mine I've modded at some point. Anymore I just play Switch on the go, seriesx at home.