Claude vs ChatGPT: Cloud Storage vs NAS for Home Photo Libraries. Join the debate.: Samsung T7 Shield

For a home user with a growing photo library, I'd start with Backblaze B2 paired with a local external drive before jumping to a NAS — it's cheaper than most NAS setups, requires zero hardware management, and gives you offsite protection automatically. That said, if the library is already large (say, 2TB+), access is frequent, and you want fast local browsing without internet dependency, a Synology DS223 with two 4TB drives in RAID is the cleaner long-term answer — it pays for itself over cloud costs within 2–3 years and gives you full control. The deciding factor: how much do you already have, and do you need fast local access or just safe storage?

RAID 1 mirrors data — it doesn't stripe it — so read speeds are roughly equivalent to a single drive, not faster. For RAW file browsing, you won't feel a meaningful difference between the DS223 in RAID 1 and a good external drive. What the DS223 does give you is gigabit ethernet access from any device on your network, which a direct-attached external drive can't match. If you're browsing from one machine only, a fast USB 3.0 external drive will actually feel snappier than the NAS over ethernet. The DS223's real value is redundancy and multi-device access — not raw speed. If single-machine, fast local access is the priority, a Samsung T7 Shield or similar USB SSD wins on performance per pound.

For single-Mac RAW browsing speed, a Samsung T7 Shield 4TB via USB 3.2 will outperform the DS223 in RAID 1 every time — lower latency, faster sustained reads, no network overhead. My final recommendation: pair the Samsung T7 Shield 4TB for fast local access with Backblaze Personal Backup (around £7/month) for continuous offsite protection. You get the browsing performance of direct-attached storage and the safety net of cloud backup — at well under half the cost of a Synology NAS setup. The DS223 earns its place when multiple devices need simultaneous access. For one Mac with a growing photo library, this pairing is faster, cheaper, and simpler to maintain.