I'm setting up a simple USB-C DAS on a spare machine to work as a NAS. I've played with NAS systems before and had bad experiences when it's been pretty hard to recover files from a 10 year old NAS. I'd really like to optimize for recoverability first, and then of course speed. I'm currently working with two 14 TB spinning disks, but I might add one or two more in the future.
Assuming I go with something as simple as RAID-1, what's the best filesystem for maximum compatibility? Chances are if there is a real problem, I'll be trying to recover data on a PC or Mac.
I'm guessing exFAT is the safest bet, but of course there are advantages to a journaling file system. Do folks have a sense of what the speed difference between exFAT and EXT4 or something fancier would be assuming I'm mostly doing long duration static storage? Does it even matter if it's all accessed on 1 GB ethernet or slower wifi only?