Quick answer
A NAS fits when you need very fast local access to large files; cloud storage fits when access-from-anywhere and zero equipment maintenance are the priority.
It’s not as often an either/or as you’d think — many businesses end up with a combination — but there’s clear logic for which to prioritize.
NAS advantages
Speed — accessing files over your local network is far faster than over the internet, critical for large files (video, CAD drawings). Also a one-time purchase instead of a monthly subscription.
Cloud storage advantages
Access from anywhere without a VPN, zero hardware maintenance, and automatic protection against physical disaster (because your data isn’t sitting in your building).
- Large files, local speed critical → NAS
- Remote work, zero maintenance → cloud
- Combined: NAS for daily work + cloud backup