1. Use biskeydump payload to confirm if your switch is hackable.
Because this payload does not need any additional files on your microsd.
But your switch should be hackable because you bought it 3 days after launch, which is before Jul 2018.
2. Once you already confirm that it is hackable, they...
I have never tried this tool so you have to figure it out.
I used jocover's script and I have to manually match what save folder are from what games.
It is a pain but better than losing a 300+ hours save files.
The file contains information regarding stats for each level.
Anyway, I found out that you can use https://sqlitebrowser.org/dl/ to open LocalDb.bytes to check several tables for itemID.
Oh I see.
Just in case that the person having this issue need a tool to format micro sdcard to FAT32.
http://www.ridgecrop.demon.co.uk/index.htm?guiformat.htm
(This is a donationware so I think it is ok to link it here)