Hi Vwars,
— fair point on the AI giveaway. I’ll come clean and admit I used a bit of AI help to smooth out my response too, just to keep things readable across four questions. Honestly, using AI to organize a multi-part question into a clean list is a perfectly reasonable forum habit — just strip the assistant’s preamble next time and you’re golden 
.
Onto the actual questions, because these are good ones and worth answering properly.
1. Hardware direction — depends on your environment
Before recommending specific models, the key question is: is this staying in an office environment, or do you have (or can build out) a server room / rack space? That single answer splits the path completely, because all four of your current units are towers, which suggests you may not have rack infrastructure today.
Path A — Stay in the office (tower form factor)
Two × TVS-h1688ATX (16-bay tower, QuTS hero). 16 + 16 = 32 bays, which gives you headroom beyond your current 24-bay total. The idea is not HA / mirroring between them — that would eat too much capacity — but rather splitting your existing four units’ data across two larger towers (e.g. each new tower absorbs two of the old units’ workloads). You go from four scattered NAS to two consolidated ones, on the same QuTS hero / ZFS platform as three of your current units.
Path B — You have or can build out rack space
Two sub-paths depending on budget:
B-1 — Budget-conscious, single-chassis consolidation: TS-h2477AXU (24-bay rackmount, QuTS hero). 24 bays is exactly your current total drive count, so you can absorb everything in one box, then expand later with a JBOD shelf when capacity demands it.
B-2 — One-and-done, future-proof: an AFA (All-Flash Array) NAS + TL-R1620Sep-RP SAS JBOD as the starting point, stepping up to TL-R6020 if you need more capacity. The architecture here is a hot tier (all-flash head unit) handling the active editing workload, plus a cold/warm tier (JBOD with HDDs) handling capacity. This is the configuration that genuinely scales for multi-editor 4K workflows and gives you years of growth headroom. The enterprise AFA lineup is here for browsing: QNAP All-Flash Enterprise NAS.
2 & 3. Drive migration and risk — I’m combining these because they’re really the same question from two angles
Short version: yes, QNAP supports moving drives between units, but with rules. Here’s the decision tree.
Step 1 — Confirm OS consistency. QNAP migration only works within the same OS family: QTS → QTS, or QuTS hero → QuTS hero. It does NOT work across the boundary, because the underlying filesystems are different (ext4 vs ZFS). Your TS-473A ships with QTS by default, while the three h-series units ship with QuTS hero — so out of the box, the 473A’s drives can’t be transplanted into an h-series ZFS pool.
Step 2 — Check if any unit has been OS-switched. This is important: QNAP units can be switched between QTS and QuTS hero, so the factory default doesn’t tell you what each unit is actually running today. Confirm the current OS on all four before planning anything. Reference: QNAP FAQ – switching between QTS and QuTS hero.
Step 3 — Pick the right migration method per source unit.
Case A — Source and target on the same OS → physical drive migration. You can detach the entire pool, move the drives as a complete set, and reattach on the target. Official guide: How to safely detach and reattach volume/storage pool. Two practical tips from experience that the documentation doesn’t emphasize enough:
- Label every drive with a sticker before pulling it. The UI steps can go perfectly and you can still mis-order drives at the physical insert step. A piece of masking tape with “Bay 3” written on it has saved more migrations than I can count.
- Rename shared folders before migration, not after. Once you’ve consolidated multiple sources into a single target NAS, you’ll want to know which folder came from which original unit — much easier to rename “Video” → “Video_from_TVS-h874” on the source side first.
Case B — Source and target on different OS (your TS-473A, assuming it’s still QTS) → HBS 3 data replication. You cannot move QTS drives into a QuTS hero pool, so the data has to be copied at the file level. Official walkthrough: How to migrate data and folder permissions between QTS and QuTS hero with HBS 3.
One note on that guide: it’s comprehensive but covers user account and folder permission migration as well, which makes it more involved than a lot of users need. If you don’t have complex permission structures (e.g. simple share-level access, no per-user/per-folder ACLs to preserve), you can skip most of that complexity and just set up an HBS 3 backup job to copy the data over — much simpler. If you do have permission structures that matter (AD/LDAP integration, granular folder ACLs), follow the full guide.
General de-risking pattern regardless of method: stand up the new system → seed the data → run incremental syncs → validate on the new system → cut editors over → keep the old units running read-only for a couple of weeks as a fallback before wiping. Don’t treat migration as a one-shot event.
4. DIY vs hiring an expert consultant
Honest answer: it depends on environmental complexity, not on the migration itself.
Things that push toward DIY being fine:
- Small team, simple account structure
- No AD/LDAP integration, no complex folder permissions
- Comfortable with networking basics, willing to invest learning time
- The remote-access setup you already have is working
Things that push toward hiring a QNAP solution partner / SI:
- Larger team with multiple departments or projects needing access separation
- Compound account structures, granular permission management
- AD/LDAP, SSO, or external collaborator access requirements
- You don’t have time to be your own admin
If you land on the “hire someone” side: since you mentioned you’re in the US, a couple of directions — there are some experienced US-based power users on this forum worth reaching out to (Bob, or NA9D, among others) who can give an sanity check or referrals. And QNAP’s US office (QUS) customer support team can also online help you with experience.
Happy to go deeper on any of these if useful — and curious which path you end up leaning toward.
