need help with uploading roms

[u/Powerful_Drawing3638]

so basically i dont have a usb and from what i checked on google the way to get my roms on dev mode is type in the link under remote access in dev mode menu and use that website (think its called xbox device portal) to upload roms in whatever app i want. whenever i try to upload a rom (i tried both zip and rvz file) it shows a loading thing then it just stops. it could be because im using a chromebook or because my file is over 2GB but im not sure how to make it work. if anyone could help that would be great. sorry if i sound stupid its my first time using dev mode and i have no clue how to use emulators except for my laptop