I am a learner and a complete newbie so please be patient 
I have a beaglebone blue I am setting up and I have run into an issue when trying to run sudo apt-get upgrade. Over serial I can see many things are not being upgraded due to “failed to fetch… could not open… read-only file system”
EXAMPLE)
E: Failed to fetch http://deb.debian.org/debian/pool/main/libc/libconfig/libconfig9_1.5-0.4_armhf.deb Could not open file /var/cache/apt/archives/partial/libconfig9_1.5-0.4_armhf.deb - open (30: Read-only file system) [IP: 146.75.30.132 80]
I am wondering how to correct this issue as I can’t even do installs from the same error
For context,
*I flashed the emmc with bone-eMMC-flasher-debian-10.3-iot-armhf-2020-04-06-4gb
*I watched the flash over serial and nothing seemed to go wrong
*I used serial to connect to my wifi (successfully) to run the sudo apt-get update and upgrade commands
If you have any idea what my issue could be I would appreciate help as I would like to improve and have been halted for some time!