An update to my situation. I've finally was able to inject the hs.app a few days ago. Don't know if it's the new micro sd card or the updated files that fixed it. Heck, it might had been micro sd usb adapter drivers installation issues with Windows 10. My N3DS is now running native A9LH custom...
Sorry for being so late to respond. Been a hectic week because of schooling. File names and extensions are normal. I had some free time and tried to validate my original nand.bin dump. It "No usable file found" error. Tried to cover all my bases and redump the nand.bin and validate it with same...
Yes I did. I tired all the versions starting from the one you linked to the most recent. I have my sysNAND backed up from the 9.2 downgrade and thinking whether I should just restore it.
Get "SD is not formatted for EmuNAND health&safety" trying to inject. Same error when trying to dump hs.app with it.
The directories of the micro sd card.
root
/3ds/
followed the suggestion and still no luck even with new micro sd card (from Samsung 128gb to Sandisk 32gb). The Health&Safety with banner injection is the beginning stage to get the OTP file, so I don't have a9lh installed yet. Used downgrade-check and came back 100% successful without errors...
Same result. Going to toss this N3DS in the closet til I'm in the mood to fiddle with it again. It went so smooth and half way this happens LMAO
Edit
I deep reformatted the sd card. Redo all the steps after the downgrade and still no luck.
FBI_inject_with_banner.app is in the root directory of micro sd card. Yes, the hs.app is dumped by me. I started off with a stock N3DS and followed the tutorial to the T, so the NAND are the same.
Original post
Troubleshoot continuation of my post above. Still no luck fixing Health&Safety inject failed error. Tried using older version of FBI.cia with Universal Inject Generator and no luck. Only thing that changes was the file size of FBI_inject_with_banner.app increased with the older...
Double checked everything, only thing I didn't follow correctly was naming nand backup to sysNAND.bin in Part 2 of the tutorial because write up didn't state you can change name with directional pad. I doubt it's because of that. Tried using VMware and still no luck. Will report in the Universal...
I hit a roadblock with Plailect's guide (Started with a stock 10.3.0-28U N3DS LL). Everything been going 100% until Part 4 Step 15. Health&Safety inject keeps failing.
Decrypt9 log file
Initializing SD card... success
0x03 KeyX & KeyY: already set up
0x05 KeyY: already set up
0x25 KeyX: already...