I have never done RAID over USB, but have done various JBOD setups using SCSI. I think the general idea is that USB having such an easily disconnected connector plus the latency overhead on translating SATA to USB to SATA again means you have a higher chance of corruption. SCSI setups typically have connectors with locking mechanisms to prevent easy disconnection.

If eSATA is an option it might be better for the performance and it has a latching mechanism to prevent easy disconnection. You can get a 2-port eSATA PCI card for about 50 bucks.

Oh, and if you have a free PCI port, you could add internal SATA ports to mount the drives internally.

With TrueNas you can do it two ways: ISCSI disks that are mounted to the VMs or via NFS. With ISCSI you won’t have access to the data from the TrueNas side as the data will be stored as a volume file. With NFS you get the best of both worlds as you’ll be able to access the files via other TrueNas services like SMB/SFTP. I have my Jellyfin/Plex running via NFS and have few issues, though I’ve not tested it with large 4k/8k videos yet. I mostly run 1080p.

This would depend on whether the limit is defined as ingress or egress or both. For example AWS has free ingress traffic from the internet but there is a cost for egress traffic to the internet.

A better solution would be to find a unmetered service, which means that you have a fixed transfer speed (e.g. 500 Mbit) but have unlimited bandwidth. OVH offers this in their VPS products.

Not OP but this is how I learned it and how it’s presented in the help file.

$ help while
while: while COMMANDS; do COMMANDS-2; done

$ help if
if: if COMMANDS; then COMMANDS; [ elif COMMANDS; then COMMANDS; ]... [ else COMMANDS; ] fi