Internal and External Hard Drives – Seagate, WD, and Toshiba HDDs | FGTech

Internal vs. External Hard Drives: What's the difference?

Can I use an external hard drive as an internal hard drive? Technically, the HDD inside an external enclosure is the same hardware, but the SATA connector is replaced with a USB-to-SATA bridge. Internal drives connect directly via SATA and achieve full native speeds. External drives are designed for portability, not permanent internal mounting.

Browse by Hard Drive type:

Internal Hard Drives: Desktop and Laptop

Internal HDDs are installed directly inside your desktop PC, laptop, or NAS enclosure and connect via SATA III. Desktop drives use a 3.5-inch form factor; laptop drives use a 2.5-inch form factor. The most common capacities at FGTech are 1TB, 2TB, and 4TB.

Speed ratings to know:

• 5400 RPM: standard for laptop and desktop archival drives; quieter, lower power draw, slightly slower sequential read speeds
• 7200 RPM: faster sequential read speeds preferred for desktop gaming, workstations, and NAS with multiple concurrent users

Best for: Desktop PC secondary storage, laptop HDD-to-HDD replacement, archival drives, NAS bays
Brands available: Seagate, WD, Toshiba

Internal HDD pricing in India typically starts at around ₹2000 - ₹4000 for 1TB and ₹8,999–₹20,000 for 2TB–4TB models. External portable drives (2.5-inch USB 3.0) start at approximately ₹3,500 to ₹6,000 for 1TB. Surveillance-rated drives (SkyHawk, WD Purple) carry a modest premium of ₹1,000 - ₹3,000 over consumer drives at the same capacity. Check current pricing at FGTech for the latest rates

External Hard Drives: Portable and Desktop

External HDDs connect via USB and require no internal installation. Portable 2.5-inch externals are bus-powered; they draw power from the USB port itself, so no separate adapter is needed. Desktop 3.5-inch externals offer higher capacities but require an AC power adapter.

USB standard matters:

• USB 2.0: max ~60 MB/s; bottlenecks most modern HDDs
• USB 3.0 / USB 3.2 Gen 1: max 625 MB/s; sufficient for all HDD read/write speeds
• USB-C (USB 3.2 Gen 2): max 10 Gbps; future-proofed, compatible with modern laptops and MacBooks

All external HDDs available at FGTech use USB 3.0 or USB 3.2 and not USB 2.0.

Best for: Laptop backup, portable file storage, media libraries, gaming console expansion, Mac and PC backup
Brands available: Seagate, WD, Toshiba

Surveillance & CCTV Hard Drives

Consumer desktop HDDs are not designed for 24/7 operation. A standard drive running as a CCTV DVR or NVR storage drive will experience significantly higher failure rates because surveillance systems write data continuously for extended periods without rest cycles.

Purpose-built surveillance HDDs: Seagate SkyHawk and WD Purple are engineered specifically for always-on write workloads.

Best for: CCTV DVR and NVR storage, always-on surveillance systems, multi-camera setups
Brands available: Seagate, WD

NAS Hard Drives

NAS drives are built for multi-bay enclosures where multiple drives spin simultaneously. The vibration from adjacent drives degrades standard consumer HDDs faster than typical desktop use would. NAS-rated drives: Seagate IronWolf and WD Red use vibration compensation technology and carry a 3-year warranty as standard.

Seagate IronWolf is rated for up to 8 bays and a 300 TB/year workload. IronWolf Pro extends this to 24 bays and 550 TB/year for rack-mounted or enterprise NAS environments.

Best for: Home NAS, small business file servers, always-on local backup storage, multi-user shared drives
Brands available: Seagate, WD
Browse our range NAS storage and enclosures at FGTech

Hard Drive capacity guide: How much do you actually need?

Not sure how much storage your camera setup needs? Use the CCTV storage calculator

HDD vs SSD: Which one do you need?

The short answer: use an SSD as your boot and primary working drive; use an HDD for bulk storage, backup, and surveillance. Both have a place in a well-configured system. Browse SSD and NVMe solid state drives at FGTech if you need that side of the equation.

Frequently Asked Questions:

What is the difference between an Internal and an External Hard Drive?

Internal drives mount inside your computer via SATA for faster speeds; external drives connect via USB for portability. An internal hard drive is a permanent part of your system. An external hard drive connects via USB and is designed to be plugged in and removed as needed. Both use the same HDD technology; the difference is the interface and form factor. Internal drives achieve slightly higher sustained read/write speeds because they bypass the USB bridge.

Which hard drive is best for CCTV and Surveillance?

Seagate SkyHawk or WD Purple. Both are purpose-built surveillance drives rated for 180 TB/year of 24/7 continuous recording. Consumer desktop hard drives are not designed for 24/7 continuous write workloads and will fail faster in a CCTV system. Seagate SkyHawk and WD Purple are engineered for always-on recording; rated for 180 TB/year workload, up to 64 simultaneous HD camera streams, and a 3-year warranty. FGTech stocks both brands, and both are available for DVR and NVR storage.

Is 1TB Internal Hard Drive enough for a laptop?

Yes, for most users a 1TB HDD gives you 900+ GB after the OS, but an SSD is usually a better upgrade for performance. For most laptop users, 1TB is sufficient. A typical laptop OS installation with apps takes 40–80GB; 1TB gives you 900+ GB for files, media, and documents. If you store large video files, edit high-resolution photos, or have an extensive game library, 2TB is the practical ceiling for most 2.5-inch laptop HDDs. Note: replacing a laptop HDD with an SSD is usually a better upgrade for performance; the 1TB question is more relevant if you're adding a secondary drive or external backup.

What is 7200 RPM vs 5400 RPM in a Hard Drive?

7200 RPM reads and writes about 50% faster (~160 MB/s vs ~110 MB/s); choose 7200 for desktops and NAS, 5400 for quiet portable drives. RPM (revolutions per minute) is the spin speed of the disk platters. A 7200 RPM drive reads and writes data faster than a 5400 RPM drive; the typical sequential read speed improves from ~110 MB/s to ~160–180 MB/s. For desktop PCs and NAS enclosures where speed matters, 7200 RPM is preferred. For portable external drives where quiet operation and lower heat generation matter more, 5400 RPM is standard. Both are available at FGTech.

Does an External Hard Drive work on both Windows and Mac?

Format as exFAT for native cross-platform compatibility on both Windows and Mac without any software. Out of the box, most external HDDs are formatted as NTFS (Windows) or exFAT. NTFS drives are readable on Mac but not writable by default without third-party software. exFAT drives work natively on both Windows and Mac without any software. If you need cross-platform compatibility, look for drives formatted as exFAT, or reformat any drive to exFAT before use. All major brands stocked at FGTech (Seagate, WD, Toshiba) support exFAT formatting.

How long do Hard Drives last?

Consumer HDDs average 3–5 years; many run 7–10 years. Surveillance and NAS drives are built for longer 24/7 operation. Consumer HDDs have an average lifespan of 3-5 years under typical use, though many drives run for 7–10 years without failure. Factors that reduce lifespan include: operating in high-temperature environments, physical shocks or drops (particularly relevant for portable drives), continuous 24/7 operation with standard consumer drives, and high annual workload ratings being exceeded. Surveillance and NAS drives are built with higher MTBF ratings and are the correct choice for always-on systems. FGTech stocks drives from Seagate and WD, whose IronWolf NAS drives carry a 3-year manufacturer warranty.

Why buy from FGTech?

FGTech is an authorised dealer for Seagate, WD, and Toshiba; every hard drive ships by air with a valid manufacturer warranty, GST invoice, and secure anti-static packaging.

• Authorised dealer for Seagate, WD, and Toshiba; manufacturer warranty verifiable on each brand's portal
• Surveillance-rated drives stocked: Seagate SkyHawk and WD Purple available for CCTV systems, not just consumer drives
• NAS drives available: Seagate IronWolf and WD Red for always-on enclosures
• GST invoice on every order: claimable for business purchases
• Pan-India shipping with anti-static, impact-resistant packaging
• All storage products are automatically upgraded to Air shipping
• Pre-sales compatibility support: contact FGTech before ordering if you're unsure which drive fits your DVR, NAS, or laptop

All Hard drives are a part of full memory and storage solutions at FGTech