3.5" hard drive prices
A 3.5" hard drive is the standard full-size internal hard disk drive found in desktop PCs and network storage devices. It holds your operating system, files, media, and backups. Before you buy, check three things: the physical size matches the drive bay in your device, the interface (usually SATA) matches what your device supports, and the drive is listed as compatible with your exact model. On PartsPrices, you can compare sizes and see which of the 83 devices in our catalog accept these drives.
- Lowest new $148.88
- Lowest used or refurbished $59.99
- Lowest per TB $7.50
- Compared 6 products
Every size compared
Best value right now
| $/TB | Price | Capacity | Product | Condition | Store | Link |
|---|---|---|---|---|---|---|
| $7.50 | $59.99 | 8 TB | Seagate BarraCuda 8TB 3.5" HDD 3.5" HDD · SATA · 5400 rpm · SMR | Used | eBay US +2 | View deal |
| $25.00 | $399.99 | 16 TB | Seagate Exos X18 16TB 3.5" SATA HDD 3.5" HDD · SATA · 7200 rpm | Used | eBay US +2 | View deal |
| $26.44 | $105.78 | 4 TB | Seagate IronWolf 4TB 3.5" NAS HDD 3.5" HDD · SATA · 5400 rpm | Used | eBay US +2 | View deal |
| $29.69 | $475.00 | 16 TB | Seagate Exos X18 16TB 3.5" SATA HDD 3.5" HDD · SATA · 7200 rpm | New | eBay US +2 | View deal |
| $31.25 | $249.99 | 8 TB | Seagate IronWolf 8TB 3.5" NAS HDD 3.5" HDD · SATA · 7200 rpm | Used | eBay US +2 | View deal |
| $31.25 | $499.99 | 16 TB | Seagate Exos X18 16TB 3.5" SATA HDD 3.5" HDD · SATA · 7200 rpm | Refurbished | eBay US | View deal |
| $31.67 | $380.00 | 12 TB | Toshiba N300 12TB 3.5" NAS HDD 3.5" HDD · SATA · 7200 rpm | Used | eBay US | View deal |
| $37.22 | $148.88 | 4 TB | Seagate IronWolf 4TB 3.5" NAS HDD 3.5" HDD · SATA · 5400 rpm | New | eBay US +2 | View deal |
| $38.50 | $307.99 | 8 TB | WD Red Plus 8TB 3.5" NAS HDD 3.5" HDD · SATA · 5640 rpm | Used | eBay US +2 | View deal |
| $39.12 | $312.99 | 8 TB | WD Red Plus 8TB 3.5" NAS HDD 3.5" HDD · SATA · 5640 rpm | New | eBay US +2 | View deal |
| $41.25 | $329.99 | 8 TB | Seagate IronWolf 8TB 3.5" NAS HDD 3.5" HDD · SATA · 7200 rpm | New | eBay US +2 | View deal |
Fits these devices
- ASUS PRIME B550-PLUS
- Synology DS224+
- Synology DS920+
- Dell OptiPlex 7010 Small Form Factor
- 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
83 devices in our catalog take this part. Search yours on the home page.
Before you buy
- Measure the bay first. A 3.5" drive needs a bay or tray built for it. It will not fit laptop slots or bays made for 2.5" drives, and small-form-factor desktops vary — some include a 3.5" bay, some do not.
- Match the interface and power. Nearly all 3.5" drives connect with SATA for data and SATA power. Confirm your device has the right connectors and that its firmware supports the capacity you pick, since older devices can have an upper limit.
- Plan for growth. Pick a size based on what you store now plus room to add more later. Also check how many drives your device holds — a device with several bays lets you start smaller and expand, while a single-bay device is limited to one drive.
- faq
Questions
Will a 3.5" hard drive fit and work in my device?
Fit depends on the bay. 3.5" drives fit standard desktop drive bays and NAS drive trays. They do not fit laptops or slots made for 2.5" drives. Small desktops vary, so check the manual. For it to work, the drive also needs to match your device's interface and appear on its supported list. Our catalog covers 83 devices that accept 3.5" drives, including desktop motherboards and NAS models, so you can check yours before buying.
How fast is a 3.5" hard drive, and does speed matter?
A mechanical drive's speed depends mainly on its rotation speed (commonly a 5400 or 7200 RPM class), its cache, and its interface. Even with SATA's top transfer rate, a spinning drive is far slower than a solid-state drive. For storing large amounts of data, backups, and media, a 3.5" drive is a practical choice. For a system drive where responsiveness matters most, an SSD is the faster option.
Is it worth buying a used or refurbished 3.5" hard drive?
Used drives cost less, but a mechanical drive wears over its life and can fail without warning, and you may not know how heavily it was used. If you buy used, check the reported power-on hours and SMART health data where possible, ask about any remaining warranty, and keep backups either way. A new drive comes with a manufacturer warranty and a known starting point.
How much storage capacity do I need?
Add up what you plan to store: a system plus apps uses a portion of the drive, media collections grow quickly, and a backup needs roughly as much room as the data it copies. Sizes on PartsPrices run from 4 TB to 24 TB. If you are between two sizes, going larger is usually the safer bet, and a device with spare bays lets you add a second drive later.