If your phone has a password on it then its data is going to be encrypted until you unlock the phone.
You can temporarily boot a twrp recovery image. It will let you put in your password and decrypt your storage.
You should be able to transfer the files to your PC with a cable then
I’d just like to interject for a moment. What you’re refering to as Manjaro, is in fact, Arch/Manjaro, or as I’ve recently taken to calling it, Arch plus Manjaro. Manjaro is not an operating system unto itself, but rather another free component of a fully functioning Arch system made useful by pacman, yay and vital system components comprising a full OS as defined by POSIX.