Main trade-off
QNAP TS-264-8G-US
Both SATA bays are occupied by a two-drive mirror.
Head-to-head
Choose TS-264 when a two-drive mirror meets the storage plan. Choose TS-464 when you need more SATA drives inside the same chassis. Their 8G configurations share two 2.5GbE ports, two M.2 slots and a PCIe expansion slot, so the extra bays are the main hardware reason to move up.
Before you choose
TS-464 leaves two SATA bays empty after a two-drive start. TS-264 leaves none.
What this is based on
Four minus two leaves two bays, while two minus two leaves zero. Migration remains subject to QTS storage rules.
Main trade-off
Both SATA bays are occupied by a two-drive mirror.
Main trade-off
Extra bays do not add M.2 sockets.


Compare QNAP TS-264 and TS-464 for a two-drive mirror, spare SATA bays, onboard NVMe storage and a future 10GbE card.
Choose TS-264 when a two-drive mirror meets the storage plan. Choose TS-464 when you need more SATA drives inside the same chassis. Their 8G configurations share two 2.5GbE ports, two M.2 slots and a PCIe expansion slot, so the extra bays are the main hardware reason to move up.
Winner by situation
TS-464 keeps two SATA positions available.
Both list two M.2 slots.
Both need optional network hardware.
Both exact selected configurations include 8 GB.
QTS RAID 6 needs four disks. TS-264 has two internal SATA bays.
What matters in practice
TS-464 leaves two SATA bays empty after a two-drive start. TS-264 leaves none.
Four minus two leaves two bays, while two minus two leaves zero. Migration remains subject to QTS storage rules.
Both models provide a 2.5GbE link on each built-in socket.
Two physical ports do not automatically combine into one faster single-client transfer.
Both models retain two onboard M.2 slots and one PCIe slot regardless of SATA bay count.
The four-bay chassis doubles SATA positions without doubling the listed M.2 or expansion slots.

QNAP, TS-264-8G-US
A two-bay NAS with two built-in NVMe slots, dual 2.5GbE and a PCIe slot for supported SSD or network expansion. The selected current 8G configuration supplies 8 GB RAM.

QNAP, TS-464-8G-US
The chassis has 4-bay storage. Its fastest documented network path is 2.5 Gbps.
Meaningful differences
| What changes | QNAP TS-264-8G-US | QNAP TS-464-8G-US | Why it matters |
|---|---|---|---|
| Internal SATA bays | 2 | 4 | A two-drive start leaves different room for later drives. |
| Built-in Ethernet | Two 2.5GbE ports | Two 2.5GbE ports | The larger chassis does not raise a single port speed. |
| M.2 NVMe slots | 2 | 2 | Extra SATA bays do not add NVMe sockets. |
| PCIe expansion | One Gen3 x2 slot | One Gen3 x2 slot | Both require an optional compatible card for 10GbE. |
| Selected base memory | 8 GB | 8 GB | The compared 8G packages begin at the same capacity. |
| Internal SATA-only RAID 6 | Two SATA bays do not meet the four-disk minimum | Four SATA bays meet the minimum with four compatible drives | A two-HDD mirror cannot supply the same two-drive-failure protection as a four-drive RAID 6 array. |
What you give up
Recommendation switch
Choose QNAP TS-464-8G-US. TS-464 has four bays.
Choose QNAP TS-264-8G-US. TS-264 provides that configuration.
Choose neither. Both need a separately purchased compatible adapter.
What matters in practice
Choose TS-464 if adding internal drives is already part of the plan. TS-264 can still serve a two-drive mirror, but expansion inside the original chassis then requires replacing existing drives. Empty bays alone do not guarantee a seamless RAID migration, so check the supported transition and keep a separate backup before changing the array.
If the current complaint is a slow wired workstation, switching to four bays leaves the built-in port rating unchanged. Inspect the client adapter, switch and storage workload first. Link aggregation or multichannel requires the appropriate complete configuration, and neither is assumed here. Select the larger NAS for storage layout, then budget networking independently.
A plan for a mirrored NVMe pool and a compatible 10GbE card is possible on either hardware layout. TS-464 adds SATA room around that plan. Choose TS-264 when two HDDs are enough, rather than expecting the larger model to supply more M.2 slots or a built-in 10GbE connection. Verify the selected card and drive compatibility.
What the facts say
Useful conclusions from the current NAS devices comparison, followed by the checked facts used to reach them.
| Product | Needs matched | Checked facts | Source records |
|---|---|---|---|
| QNAP TS-264-8G-US |
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| QNAP TS-464-8G-US |
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