Seagate Backup Plus 3 TB USB 3.0 Desktop External Hard Drive STCA3000100
Bottom line: The Seagate Backup Plus 3 TB USB 3.0 Desktop External Hard Drive ($234.99 on Amazon as of 2026-10-07): 3 TB capacity handles full-system images plus years of photo and video archives; main trade-off: desktop form factor needs external AC power, so it is not travel-friendly.
As an Amazon Associate, SpecPicks earns from qualifying purchases. Full disclosure →
*Price sourced from Amazon.com. Last updated 2026-10-07. Price and availability subject to change.
Pros & Cons
Pros
- ✓ 3 TB capacity handles full-system images plus years of photo and video archives
- ✓ USB 3.0 interface for fast transfers, backward compatible with USB 2.0 ports
- ✓ Pre-loaded NTFS driver lets you swap between PC and Mac without reformatting
- ✓ Seagate Dashboard Protect sets a one-click or fully scheduled local backup plan
- ✓ Optional adapter adds Thunderbolt or FireWire 800 for older Mac setups
Cons
- ✗ Desktop form factor needs external AC power, so it is not travel-friendly
- ✗ Usable capacity lands below the advertised 3 TB after formatting
- ✗ Thunderbolt and FireWire 800 require an adapter sold separately
- ✗ Save and Share social-network features depend on Seagate Dashboard software
Manufacturer description
The Seagate Backup Plus 3 TB desktop external hard drive is built for one job: keeping a local copy of everything you would hate to lose. Three terabytes of USB 3.0 storage gives you room for years of photo libraries, video projects, game captures, and full system images without constantly triaging what stays and what goes. The included Seagate Dashboard software drives the experience — the Protect function sets up a one-click backup plan or a custom schedule, while the Save feature pulls user-generated content down from your social networks and Share pushes multiple files back up in a…
SpecPicks Verdict
SpecPicks scored Seagate Backup Plus 3 TB USB 3.0 Desktop External Hard Drive… using a rating × review-volume × price-fit model applied to published specs and reviews across the external storage category. Compare with similarly-priced alternatives in the external storage category before committing. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for external storage of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Frequently Asked Questions
How much can I actually store on a 3 TB Backup Plus drive?
The drive is rated at 3 TB, but Seagate notes that available storage capacity may vary - formatting overhead means the usable figure your operating system reports will be somewhat lower.
Does this work with a Mac, or do I have to reformat it?
It ships with a pre-loaded NTFS driver for Mac, so you can install that driver and use the same drive interchangeably between PC and Mac computers without reformatting.
Can I connect it with Thunderbolt or FireWire 800?
Yes, but not out of the box. The drive uses USB 3.0 natively; Thunderbolt and FireWire 800 require a separate adapter that Seagate offers as an additional purchase.
What does the Seagate Dashboard software actually do?
Three things: Protect sets up a one-click or custom scheduled local backup, Save pulls your user-generated content down from social networks, and Share uploads multiple files to social networks at once from your computer.
Key Features
- Keep copies of your precious digital files, in case disaster strikes
- Impressive 3 TB storage capacity
- Save feature enables user-generated content to be backed up from your favorite social network
- Share feature allows multiple files to be uploaded to social networks at once from your computer
- Install the pre-loaded NTFS driver for Mac and use the drive interchangeably between PC and Mac computers without reformatting
- Features USB 3.0 for quick data transfer rates; upgrade to Thunderbolt technology or FireWire 800 with the available additional adapter
Full Specifications
| Brand | Seagate |
|---|---|
| Color | Black |
| Model Name | Seagate Backup Plus |
| Form Factor | Desktop |
| Media Speed | up to 65 MB/s |
| Connectivity | USB |
| Model Number | STCA3000101 |
| Compatibility | PC, Mac |
| Hard-Drive Size | 3 TB |
| Mfr Part Number | STCA3000101 |
| Number of Items | 1 |
| Special Feature | Compact |
| Hardware Platform | PC;Mac |
| Installation Type | External Hard Drive |
| Compatible Devices | Smartphone |
| Data Transfer Rate | 5000 megabits_per_second |
| Enclosure Material | Aluminum/Glass |
| Additional Features | Compact |
| Hard Disk Interface | USB 1.1 |
| Customer Package Type | Standard Packaging |
Ready to buy?
Seagate Backup Plus 3 TB USB 3.0 Desktop External Hard Drive STCA3000100 is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-10-07. Price and availability subject to change.
Related External Storage
More guides & deep dives from the SpecPicks archive
Browse all articles & guides →- Best Budget Gaming PC Build 2026 — ~$1,000 ($800 on Sale)
- How to Build a Windows 98 Retro PC in 2026
- RTX 4070 Super vs RX 7800 XT — Which to Buy in 2026
- Emulation Hardware in 2026: FPGA, Software, and Cart-Reader Ecosystems
- Best Retro Handhelds in 2026 — From $35 to $500
- Best 1440p Gaming GPUs in 2026
- The Complete Voodoo5 5500 AGP Driver Guide (2026 Edition)
More reviews from the SpecPicks archive
Browse all reviews →- Best CPU Cooler for the Ryzen 7 5800X: Air vs 240mm AIO
- NVIDIA Nemotron 3 Ultra: What It Takes to Run Locally
- GPT-5.6 Sol Matches Fable 5 at 1/3 Cost: Local-Rig Fallout
- Adding USB Storage to a Windows 98 PC With a SATA/IDE Adapter
- Best Wireless Controller for PC LAN Parties & Couch Co-Op in 2026
- Logitech G29 vs HORI Force Feedback Wheel — Which First Wheel Is Right?
- SATA SSD vs NVMe for a Ryzen 5 5600G Budget Build in 2026
- Forza Horizon 6 on Steam Deck: Best Settings, Dock & Storage in 2026
- Build a Self-Updating 24/7 FM Radio Station on a Raspberry Pi Zero W
- Anthropic May Follow Microsoft to AMD: What It Means for Home AI Rigs
- Qwen3.6-27B vs Coder-Next: Local Code Accuracy and VRAM on AMD Rigs
- Best Storage Upgrades for Gaming and Retro PCs in 2026
- How to Run a SATA SSD on a Windows XP Retro Gaming PC (AHCI + Adapters)
- Home Assistant on a Raspberry Pi 4 8GB in 2026: SSD Boot, Power Draw, Performance
- RTX 3060 12GB vs RX 7600 XT for Local LLMs: The Cheap Inference Card to Buy in 2026
- Best SATA SSDs for Gaming and Emulation in 2026
- Best Budget Streaming Mic + Capture Setup: Blue Yeti vs HyperX QuadCast 2 S
- Qwen 3.6 vs Frontier Models on a Local Rig: The Honest Gap
- Raspberry Pi OS Moves to Linux 6.18 LTS: What Changes for Pi Builders
- Can Local Qwen 3.6 Match Frontier Models at Canvas Code?
- Local LLM Use Cases in 2026: What a 12GB Rig Actually Delivers
- 8BitDo Pro 2 vs GameSir G7 SE for Raspberry Pi Emulation
- Wooden CPU Cooler: How to Build One and What to Expect
- Local LLM Hardware in 2025: Picking GPUs, CPUs & RAM
Earliest SpecPicks reviews
Browse full archive →- Best GPU for Llama 3.1 8B (2026)
- Best GPU for Qwen 3 14B (2026)
- Best GPU for Qwen 3 32B (2026)
- Best GPU for Llama 3.1 70B (2026)
- Best GPU for DeepSeek-R1 32B (2026)
- Best GPU for Llama 3.1 405B (2026)
- How to run Llama 3.1 8B on NVIDIA GeForce RTX 5090
- How to run Qwen 3 14B on NVIDIA GeForce RTX 5090
- How to run Qwen 3 32B on NVIDIA GeForce RTX 5090
- How to run Llama 3.1 70B on NVIDIA GeForce RTX 5090
- How to run DeepSeek-R1 32B on NVIDIA GeForce RTX 5090
- How to run Llama 3.1 8B on NVIDIA GeForce RTX 4090