# Toshiba PH3100U-1EXB 1TB External HDD: USB 2.0 vs eSATA Speed and Buying Cautions > USB 2.0 caps near 30 MB/s; eSATA fills 1TB in ~3 hours. Ships NTFS. Check SMART before buying. Tags: toshiba, ph3100u-1exb, external-hdd, 1tb, usb-2-0, esata, backup Source: https://www.amazon.co.jp/dp/B002HWRK66 Article page: https://web-autoai.com/articles/toshiba-1tb-usb-20?lang=en Prices and ratings change over time — check the article page for the current values. --- ## Overview The Toshiba PH3100U-1EXB 1TB USB 2.0/eSATA External HDD is a desktop external drive that houses a 3.5-inch hard disk in an AC-powered enclosure. Capacity is 1TB, and it offers dual connectivity over USB 2.0 and eSATA. The listed compatible device type is "desktop," the color is black/silver, and the stated use case is personal. It dates from around 2010, when 1TB was pitched as "enough to back up an entire PC. " Here is the verdict up front: this is not a drive to go hunting for today. It was designed when USB 2.0 was the mainstream interface, and it loses on both throughput and cost per gigabyte against anything current. It makes sense in exactly three situations: you already own the unit; you need to connect to an older PC with no USB 3.0 ports; or you have a free eSATA port on a desktop and want to bypass USB entirely. They say little about the condition of a unit shipping to you in 2026. ## Compatibility Guide There are two connection paths: USB 2.0 at a theoretical 480 Mbps, and eSATA at a theoretical 3 Gbps. In practice it breaks down like this. | Interface | Theoretical | Realistic throughput | Time to fill 1TB | |---|---|---|---| | USB 2.0 | 480 Mbps | around 30 MB/s | roughly 9 hours | | eSATA | 3 Gbps | limited by the HDD (~100 MB/s) | roughly 3 hours | The realistic figures are estimates based on how 3.5-inch drives and USB 2.0 controllers typically behave; your numbers will vary. The ratio matters more than the absolute values: USB 2.0 gives you less than a third of what eSATA does. If your desktop has a spare eSATA port, use it. A full backup goes from "leave it overnight" to "leave it during dinner. " Physical constraints matter too. The form factor is 3.5-inch and power comes from an external AC adapter — it is not bus-powered. That means a mains outlet is mandatory, which rules out travel use with a laptop. Its footprint is nothing like a 2.5-inch portable drive, and it produces audible noise and real heat. The drive ships formatted as NTFS. Windows users can plug and go. macOS mounts NTFS read-only, so Mac users must reformat: exFAT for cross-platform read/write, APFS or HFS+ for Mac-only use. Reformatting erases everything, so check the contents first — especially on a used unit that may still hold the previous owner's data. One more eSATA caveat: hot-plugging over eSATA assumes your motherboard's SATA controller is running in AHCI mode. Left in IDE compatibility mode, the drive may not be detected, or connecting and disconnecting it may destabilize the OS. Check your BIOS/UEFI SATA setting first. Note also that eSATA carries no power, so the AC adapter is required either way. ## Product Details The published specifications are as follows. | Item | Value | |---|---| | Capacity | 1 TB | | Connectivity | USB 2.0, eSATA | | Hard disk description | Desktop | | Compatible devices | Desktop | | Installation type | External hard drive | | Form factor | 3.5-inch | | Power | External AC adapter | | Color | Black / Silver | | Recommended use | Personal | Toshiba's marketing describes 1TB as holding up to 200,000 photos, 250,000 music files, or 380 hours of video. The enclosure includes an internal shock-dampening system, and the bundled software provides password protection plus full system backup and restore. In the box: a USB cable, an eSATA cable, an AC adapter, a quick start guide, and preloaded backup software. The standard warranty is listed as one year, but with more than a decade elapsed since launch, no unit still carries manufacturer coverage. Whatever protection you get comes from the seller, so read their terms before buying. All three are plainly high for a 1TB external drive — the same money buys several times the capacity in a current model. That reflects discontinued-stock scarcity pricing rather than product merit. Prices move a lot, so always check the current figure on the listing page. ## Why Choose It, and Why Not The two axes that matter are cost per gigabyte and throughput. Current external drives ship with USB 3.0 or newer, sustain well over 100 MB/s, and typically offer 4TB to 8TB. The PH3100U-1EXB loses on both counts. Taking the captured prices at face value, the gap in cost per gigabyte is an order of magnitude. The one argument in its favor is the interface. On a PC without USB 3.0, buying a modern USB 3.2 drive still gets you USB 2.0 speeds. And on a desktop where every USB port is occupied but eSATA is free, being able to connect over eSATA is itself the feature. In those setups the priority is not speed but a connection that works reliably with stable power — which is exactly what an AC-powered, stay-put enclosure delivers. Swapping the internal 3.5-inch disk for a larger one raises capacity, but the enclosure's USB 2.0 controller means speed will not improve by a single byte. If capacity is the goal, buy a current USB 3. x enclosure or move to an internal drive instead. ## Setup Steps 1. Choose a location. The AC adapter means it must reach both an outlet and the PC. Pick a ventilated spot on a rigid surface to limit heat and resonance. 2. Choose the interface: eSATA if you have a port, otherwise USB 2.0. Connecting both at once is not a supported configuration. 3. Connect and power on the drive's AC adapter first, then attach the data cable. For eSATA, confirm AHCI mode in BIOS/UEFI beforehand. 4. On Windows, verify detection in Disk Management. Keep NTFS or reformat as needed. 5. Configure backups. The bundled software targets the Windows versions of its era and may not install on current releases; fall back on the OS's built-in backup tools or a modern backup application. ## Best Use Cases This drive suits people looking for a backup target on an older desktop with no USB 3.0, people with a spare eSATA port who want to avoid USB, and anyone whose workflow is "leave it under the desk and let an incremental backup run overnight. " In stay-connected, stay-put use, USB 2.0's slowness costs you nothing real. If you already own one, it remains a perfectly serviceable archive target. 1TB is plenty for photo, music, and document libraries, and the Toshiba enclosure is solidly built. Using it up rather than replacing it is a reasonable call. It is a poor fit for anyone wanting a working drive for video editing, anyone who needs portability, anyone on a USB-C or Thunderbolt-centric setup, and anyone shopping primarily on cost per gigabyte. ## Before You Buy Start with age. A product from around 2010 sold as "new" is almost certainly long-shelved dead stock, and a used unit may have very high power-on hours. A hard disk is a mechanical assembly; lubricants and components degrade even in storage. The moment it arrives, read the SMART data — power-on count, power-on hours, reallocated sectors, and pending sectors. Bad numbers there let you make a decision before you trust it with anything. Second, do not make it your only backup. The shock-dampening system cushions handling and transport; it does not promise the drive will survive. Keep important data on the 3-2-1 principle: three copies, two media types, one off-site. A decade-old drive holding the only copy of your family photos is the exact configuration to avoid. Third, do not lean on the bundled software. Both the backup tool and the password protection feature were written for the Windows versions of that era and may refuse to install today, or install and then fail at restore time. Encryption is the dangerous one: if the software stops running, your data becomes unreachable too. Confirm that current OS-native tools cover your needs first. A word on price: at the time of capture, all three storefronts listed this drive well above what 1TB of external storage is worth. That is normal for discontinued hardware, but unless you specifically need this model number, the same money buys far more capacity in a current product. Finally, check the listing itself. The seller and shipper here are a third-party store (Good Value Online Store), not Toshiba, and listings of this kind often carry details that do not match the physical item. Confirm the product images, the title, and the model number PH3100U-1EXB with your own eyes, and ask the seller whether the capacity and the accessories — AC adapter, USB cable, eSATA cable — are all present. A missing AC adapter alone turns this into a sourcing project. ## FAQ **Q. Will plugging it into a USB 3.0 port make it faster? ** A. No. The drive side is USB 2.0, so you are capped at 480 Mbps (about 30 MB/s in practice). It will connect and work, just not faster. **Q. Can I use eSATA and USB 2.0 at the same time? ** A. Simultaneous connection is not supported. Pick one; choose eSATA if you want speed. **Q. Does it work with a Mac? ** A. It mounts over USB, but the factory NTFS format is read-only on macOS. Reformat to exFAT or similar to write to it — which erases the contents. **Q. Can I use it to record from a TV or set-top box? ** A. It may work if the device supports generic USB 2.0 external drives, but this model makes no recording-compatibility claim. Check the device maker's supported-hardware list. **Q. Can I swap the internal 3.5-inch disk for a larger one? ** A. Physically it holds a 3.5-inch SATA drive, but opening the enclosure voids any coverage — and the USB 2.0 ceiling stays exactly where it is. **Q. Is it noisy? ** A. It is a 3.5-inch desktop drive, so seek and spindle noise are more noticeable than on a 2.5-inch portable. If it runs continuously, under the desk beats on top of it. ### Product Disclosure (Amazon) - Manufacturer: 東芝(TOSHIBA) - Seller: Good Value Online Store - Fulfilled by: Good Value Online Store - ASIN: B002HWRK66 - Note: This article covers a manufacturer-made product based on Amazon listing details.