NAS vs Cloud Storage: Which Is Better for Your Files?

Your laptop is nearly full, the shared drive is a mess of USB sticks, and someone on the team just asked where the “final” version of a client file lives. At some point every home office and small business has to decide where its files should actually live: on a box you own, or on someone else’s servers.

That’s the NAS vs cloud storage question. A network-attached storage (NAS) device sits on your desk or in a closet and serves files over your network. Cloud storage keeps your files in a provider’s data centers and syncs them to your devices over the internet. Both work well. They just fail in different ways, cost money in different ways and ask different amounts of your time.

This guide compares the two on cost over time, access, backup and maintenance, then shows how most people end up combining them.

What a NAS is and what cloud storage is

A NAS is a small computer built for storage. It holds 1 or more hard drives or SSDs, connects to your router with a network cable and shows up on your computers as a shared drive. Popular NAS makers include Synology, QNAP, Asustor and TerraMaster, and many units also run apps for photo libraries, media streaming, backups and even remote access.

Most NAS boxes use RAID or a similar scheme to spread data across several drives, so 1 drive can fail without losing files. That protects you against a dead disk, but it is not a backup. If you delete a folder, get hit by ransomware or the NAS is stolen, RAID copies the damage to every drive.

Cloud storage comes in 2 broad flavors:

• Sync and share services such as Google Drive, Microsoft OneDrive, iCloud and Dropbox. Files live in the cloud and sync to every signed-in device. If you’re weighing these against each other, see our comparison of iCloud vs Google Drive vs OneDrive.
• Object storage and backup services such as Backblaze B2, Amazon S3, Wasabi or Synology C2. These are built for storing large amounts of data cheaply, often as a backup target rather than a place you browse every day.

NAS vs cloud storage at a glance

Key takeaway: A NAS wins on speed and long-term cost for large amounts of data. The cloud wins on access and offsite protection. Neither one alone is a complete backup plan.

Cost over time

This is where most people get the comparison wrong, because the two models charge in completely different shapes.

A NAS is mostly an upfront cost. You buy the enclosure and the drives, then pay small ongoing costs: electricity for a device that runs 24 hours a day, and replacement drives every few years as they age or fail. Prices vary widely by brand, number of drive bays and drive capacity, so get current quotes for the size you need. The more data you store, the better a NAS looks, because adding terabytes means buying another drive rather than raising a monthly bill forever.

Cloud storage is an ongoing cost. Consumer sync plans charge a flat monthly or yearly fee for a set amount of space. Object storage charges per terabyte per month. For example, Backblaze lists B2 pay-as-you-go storage at $6.95 per TB per month, with free downloads up to 3 times your average stored data, and its first 10 GB free. Other providers price differently, and some charge for downloads (called egress), so read the full pricing page before you commit. Our guide to how cloud pricing works explains storage, egress and request fees in plain terms.

A simple way to compare: total up what the cloud would cost for your data over 5 years, including expected growth, and compare it with the NAS hardware, drives and a replacement drive or two over the same period. For a few hundred gigabytes, the cloud is usually cheaper and simpler. For many terabytes of photos, video or design files, a NAS often pays for itself, but you still need to pay for an offsite copy somewhere.

Access: working from the office vs anywhere

On the local network, a NAS is hard to beat. Opening a 4 GB video file from a NAS over a wired gigabit connection feels much like opening it from an internal drive. Pulling the same file from the cloud depends on your internet plan, and upload speeds on many home and small-business connections are much slower than downloads. If you’re unsure what your line can handle, check our guide to what internet speed you need.

Away from the office, the cloud is easier. Sync services work on phones, tablets and laptops with no setup beyond signing in, and they make sharing a link with a client trivial.

A NAS can do remote access too, through the maker’s relay service, a VPN or a cloud sync app. The safest pattern is to avoid exposing the NAS directly to the internet. NAS devices that were reachable from the open internet were the target of ransomware campaigns such as DeadBolt, which hit QNAP devices in 2022. QNAP’s advice at the time was to update firmware and keep the NAS off the public internet. If you need remote access, use a VPN or the vendor’s secure relay, turn on multi-factor authentication and disable automatic port forwarding (UPnP) on the router.

Backup and protection against loss

This is the part that matters most, and it’s where both options can let you down.

A NAS alone protects you from a failed drive, and little else. Fire, theft, a power surge, a flood or ransomware that reaches the NAS over the network can wipe out the box and every copy on it. Snapshots help a lot here: many NAS systems can take read-only, point-in-time snapshots that let you roll back a folder after an accidental delete or an encryption attack.

Sync services are not backups either. If a file is deleted or encrypted on your laptop, the sync client faithfully deletes or overwrites the cloud copy too. Version history and recycle bins give you a window to recover, but that window is limited and varies by plan.

CISA’s ransomware guide tells organizations to maintain offline, encrypted backups of critical data and to test them regularly, because many ransomware strains look for reachable backups and destroy them first. The widely used 3-2-1 rule turns that into a simple plan: keep 3 copies of your data, on 2 different types of storage, with 1 copy offsite.

Here’s how NAS and cloud fit into that rule:

1. Copy 1: your working files on laptops and desktops.
2. Copy 2: the NAS, with snapshots turned on, holding a backup or the shared master copy.
3. Copy 3: an offsite cloud backup of the NAS, ideally encrypted before upload and with versioning or immutability enabled.

Most NAS makers include a tool for step 3. Synology’s Hyper Backup, for example, can back up to its C2 Storage service with client-side AES-256 encryption, and to third-party cloud providers. For a fuller small-business plan, read how to back up business data and ransomware protection for small business.

Maintenance: who does the work

With the cloud, the provider replaces failed disks, patches servers and runs the data center. Your job is account security: strong passwords, two-factor authentication, and removing access when people leave.

With a NAS, you are the data center. That means:

• Installing operating system and app updates promptly
• Watching drive health alerts and replacing failing drives
• Changing the default admin account and using strong, unique passwords
• Keeping the NAS on a surge protector or, better, a small UPS
• Checking that backup jobs actually finish, and test-restoring files a few times a year

None of this takes long once it’s set up, but someone has to own it. If nobody in the office will, a managed IT provider can, or the cloud may simply be the better fit.

Which one should you choose?

Choose cloud storage first if:

• You have under a terabyte or two of active files
• Your team works remotely or from several locations
• Nobody wants to look after hardware
• You need easy sharing with clients and partners

Choose a NAS first if:

• You store several terabytes, especially photos, video, CAD or design files
• Several people on one network open large files every day
• You want to control where data lives and avoid growing monthly bills
• Someone is comfortable handling updates and drive checks

Choose both if you have a NAS at all. A NAS without an offsite copy is a single point of failure.

Where to start

1. Measure your data. Add up what you store today and estimate growth over 3 to 5 years.
2. Map how people work. Count who needs files, from where and how big those files are.
3. Price both paths over 5 years. Include cloud plan increases or per-terabyte fees on one side, and hardware, drives and replacements on the other.
4. Pick your primary storage. Cloud sync for remote, light-file teams; NAS for heavy local files.
5. Add the missing copy. If you chose a NAS, set up an encrypted cloud backup of it. If you chose a sync service, add a separate backup so deletions and ransomware can’t wipe your only copy.
6. Lock down access. Turn on MFA everywhere, and never forward NAS ports straight to the internet.
7. Test a restore. Recover a few real files from your backup before you need to.

Conclusion

NAS vs cloud storage isn’t really a winner-take-all choice. The cloud gives you access anywhere and a copy that survives a disaster at the office. A NAS gives you speed, capacity and control at a lower cost per terabyte over time. For most homes and small offices, the strongest setup uses a NAS or sync service for day-to-day files and a separate, encrypted cloud backup for the copy you hope you never need.

Sources

• CISA: #StopRansomware Guide — maintain offline, encrypted backups and test them regularly
• Backblaze: B2 Cloud Storage pricing — $6.95 per TB per month, free egress up to 3x stored data, 10 GB free
• Synology: C2 Storage — Hyper Backup to C2 with client-side AES-256 encryption
• QNAP: DeadBolt Ransomware security advisory (QSA-22-02) — 2022 DeadBolt attacks on internet-exposed NAS and guidance to update and avoid exposure