Cheapest 4 TB 3.5" hard drive
A 4 TB 3.5" hard drive is a desktop-class storage drive that holds about 4 terabytes of data — documents, photos, video, backups, and game or media libraries. It's a good fit for desktop PCs, NAS units, and external enclosures. Before you buy, check three things: the 3.5" form factor, the interface your device uses (most take SATA), and whether your motherboard, NAS, or case lists it as compatible. This page compares 4 TB drive prices across stores.
- Lowest new $148.88
- Lowest used or refurbished $105.78
- Lowest per TB $26.44
- Compared 1 product
Fits these devices
- ASUS PRIME B550-PLUS
- Synology DS224+
- Synology DS920+
- Dell OptiPlex 3000 Small Form Factor
- ASRock B550M Pro4
- Dell OptiPlex 3080 Small Form Factor
- ASUS ROG STRIX X670E-E GAMING WIFI
- ASUS ROG STRIX B650E-F GAMING WIFI
- ASUS TUF GAMING B550-PLUS WIFI II
- Dell OptiPlex 3070 Small Form Factor
- Dell OptiPlex 5070 Small Form Factor
- Dell PowerEdge R220
73 devices in our catalog take this part. Search yours on the home page.
Before you buy
- Match the bay, not just the label. A 3.5" drive fits a desktop case or a NAS tray, but check the drive height, the mounting holes or screws your case uses, and whether the bay needs a tray or caddy. Our compatibility list shows which of the 72 devices in our catalog accept this size.
- Confirm the interface before you order. Most consumer 3.5" drives use SATA for both data and power. If your device expects a different connection, or if the power connectors in your enclosure don't match, the drive won't work even though it physically fits.
- Leave yourself headroom. If you're storing media libraries, backups, or camera footage, a 4 TB drive can fill faster than you expect. Think about how much you keep, how fast it grows, and whether you'll want room to expand — you can also compare 8 TB, 12 TB, 16 TB, 20 TB, and 24 TB on this site.
Questions
Will a 4 TB 3.5" hard drive fit in my PC or NAS?
If your device has a 3.5" drive bay or a tray that takes 3.5" drives, yes. Laptops and most small-form-factor systems take only 2.5" drives instead. Check the bay size, the screw pattern or tray, and the available connectors. The device list on this page tells you which models in our catalog accept this part.
How fast is a 4 TB 3.5" hard drive?
Speed depends on the drive's rotation rate and interface. Most 3.5" drives use SATA and come in common rotation speeds such as 5,400 rpm or 7,200 rpm; faster-spinning drives generally handle sequential transfers more quickly. Any hard drive is slower than an SSD for random access, so they're best for bulk storage rather than as a boot drive.
Is 4 TB enough storage, or should I buy more?
It depends on what you're storing. 4 TB holds a lot of documents, photos, and music, but large video files, game installs, and full system backups can eat into it quickly. Add up what you have now and estimate how much it grows each year, then pick a size with room to spare. Larger options are easy to compare on this site.
Should I buy a new or a used hard drive?
A new drive gives you a full manufacturer warranty and no prior usage history. A used drive is usually cheaper, but it may have years of runtime already, and drives wear out with age and use. If you go used, ask for the drive's health or power-on hours, and always keep backups — that applies to new drives too.