NEVER use exFAT. Please, backup data and format it to ext4, then restore data.
If this an empty disk - then format it right away, as described in the guide. You must use /dev/sda2 as a disk in this case.
So this might be the reason for the pi not booting after fstab-edit? I will try to reformat it now, even though gdisk (according to guide) is not found.
You must use only UUID from the output.
If you want to try your luck - you can specify exfat instead of ext4 in the /etc/fstab. It will work, but you will lose your node sooner or later due to power loss, because this FS is not designed to be easy recovered, they simplify a lot. It’s designed for Photo/Video cams, not for intensive data storing/sharing.
You also sacrifice a lot of space, because cluster size on exFAT is big, but stored files relatively small, thus you will waste up to 40% of the space.
Then try to download again. You can skip the installation commands.
I would not recommend to generate an identity on Raspberry Pi - it could take week(s).
If you have a PC/Mac, I would recommend to generate it there and then transfer to the disk for data.
If you do so, you should modify the path to the identity in all commands (/home/pi/.local/share/storj/identity/storagenode to something like /mnt/storj/storagenode/identity, where /mnt/storj/storagenode/identity - the folder with 6 files belonging to identity).
Don’t forget to authorize the identity with an authorization token and check it before transfer to the RPI: Identity - Node Operator
The identity binary would not be needed after authorization.