Homebrew Question Switchroot - Twrp Not Detecting Micro SD Card

[Sylvan]

I was wondering if anyone could help me with Twrp when trying to mount the partitions from my 128gb sd card and whenever I tried to mount System, data, and micro sd card it wouldn’t let me and when I went to the option that has 4 lines at the bottom of the screen it keeps saying unable to mount system, data, and micro sd card and in the top left corner of the screen every time I load into Twrp it says that there is 0 mb in my sd card and I’ve reflashed my sd card two times and it still doesn’t work, and I’ve checked the hash sums for the 128gb image before I flash my sd card and it’s fine so I don’t know what else to do and if someone can help I would really appreciate it.