Which do you prefer and why for HDD or SDD hard disks ? And how is Ext4 with power failures nowadays ? iirc a few years ago there were issues with Ext3 (Yes, Ext3) and I remember a no barrier option was needed ? Is Ext4 much better ? And what FS do you prefer on usb storage ?
Bfrfs for automatic snapshots and easier data recoverability out-of-the-box. I use it on SSD, but I imagine that on a HDD it works just fine too.