In my experience I had to get games running from the D: drive which was technically on my SSD but I believe it needs to read from the Q: drive.....there is settinga to change the directories.....if you have retail retroarch use the ftp program if you have it. Place all roms in the downloads folder of retrospection.
I got the roms in "U:Users/UserMgr0/AppData/Local/Packages/52269xbonedev1.Retrospection_8s8y06avre9fr/LocalState/roms/"
The cores are supposedly in "Srogram Files/WindowsApps/52269xbonedev1.Retrospection_1.9.14.70_x64__8s8y06avre9fr/cores/" but i cant verify that as i cant get to that location.
Sample playlist looks like...
"items": [
{
"path": "U:Users/UserMgr0/AppData/Local/Packages/52269xbonedev1.Retrospection_8s8y06avre9fr/LocalState/roms/nes/1943 - The Battle of Midway (USA).zip",
"label": "1943 - The Battle of Midway",
"core_path": "Srogram Files/WindowsApps/52269xbonedev1.Retrospection_1.9.14.70_x64__8s8y06avre9fr/cores/fceumm_libretro.self",
"core_name": "FCEUmm",
"crc32": "DETECT",
"db_name": "nes.lpl"
},
...
]
But retroarch crashes when i go past it to the folder scan heading on the 2nd to last header in the UI.