I’m just about ready to use my TrueNAS setup in my home “production” environment, but am wondering about the data backup. TrueNAS/ZFS “Replication” and “Snapshots” is totally foreign to me. I do still need to figure out the syncing to the offsite and what method is best (was going to use rsync but…

There is an active feature request regarding the USB backup, please take a look: [image] Local Backup to SATA or USB HDD Feature Requests The lifetime of four weeks was just an example. Having long snapshot lifetimes could serve as a workaround, but it wouldn…

Thanks guys. All those links, as I understand it, seem to be for hot-swappable backup disks. But I am thinking more so just a rsync or maybe even Replication task for it? And, maybe most different from those, my drive would be plugged in to the USB port 24/7. I feel like if it’s not… my backups will…

The instructions I wrote can be used on a semi-permanently attached backup disk. Just skip the import and export parts, (which were manual). One note, USB attached disks are not known to be reliable enough for 24/7/365 operation. For some reason either USB or Linux is just not capable of maintaini…

But surely the mounting and unmounting of it help alleviates that? Or are you saying that at one point for example the disk may not even appear to be mountable? And would then need to be physically unplugged / powered off and reconnected or something?

[image] Kaitlyn2004: But surely the mounting and unmounting of it help alleviates that? Actually yes, ZFS export when done, and import before use will probably be okay. Keep in mind, mounting a ZFS Dataset or un-mounting it, does not affect the pool’s presence on the server. Exporting the po…

I saw this in the Feature Request and didn’t feel it needed attention, but that’s up to whoever sees value in it. From my perspective, you can just attach any USB storage to an end workstation and back up the data. Yes, it will not include any snapshots, but snapshots take up storage space. If yo…

Maybe zerobyte is a project to have an eye on. Right now it’s in early stage and probably not what i would call “production ready” but is has potential.

Back up to connected USB drive

TrueNAS General

Arwen February 1, 2026, 10:20pm 3

There are several Resource articles, with attached scripts, that do allow local backups, (including to USB attached disks). I’ve written the first years ago on the old forum:

Topic		Replies	Views
Local Backup to SATA or USB HDD Feature Requests Backups , backup	25	1009	August 1, 2026
Offline Backup TrueNAS General SCALE	8	1291	December 1, 2024
A question about my backup strategy TrueNAS General	8	74	April 1, 2026
Maybe support local target rsync? TrueNAS General SCALE , Feature-Request	35	1144	December 19, 2025
Single drive ZFS pool for cold storage? (With offline backups) TrueNAS General ZFS	77	1123	April 15, 2026

Back up to connected USB drive

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