--- product_id: 24923784 title: "Seagate Expansion 640 GB USB 2.0 Portable External Hard Drive ST906404EXA101-RK" brand: "seagate" price: "5133CFA" currency: XOF in_stock: false reviews_count: 9 url: https://www.desertcart.sn/products/24923784-seagate-expansion-640-gb-usb-2-0-portable-external-hard store_origin: SN region: Senegal --- # 5400 RPM spindle speed 640 GB storage capacity USB-powered, no external adapter Seagate Expansion 640 GB USB 2.0 Portable External Hard Drive ST906404EXA101-RK **Brand:** seagate **Price:** 5133CFA **Availability:** ❌ Out of Stock ## Summary > πŸ’Ό Carry Your Career’s Backup in Your Pocket! ## Quick Answers - **What is this?** Seagate Expansion 640 GB USB 2.0 Portable External Hard Drive ST906404EXA101-RK by seagate - **How much does it cost?** 5133CFA with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/24923784-seagate-expansion-640-gb-usb-2-0-portable-external-hard) ## Best For - seagate enthusiasts ## Why This Product - Trusted seagate brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Silent & Efficient:** Whisper-quiet 5400 RPM drive with energy-saving tech keeps your workspace distraction-free. - β€’ **Generous Storage Space:** 640 GB capacity means ample room for all your critical files, presentations, and media. - β€’ **Plug & Play Simplicity:** No software, no setupβ€”just connect and go with instant Windows recognition. - β€’ **Power Without the Bulk:** USB-powered design eliminates the need for extra power bricks, perfect for on-the-go pros. - β€’ **Shock-Resistant Durability:** Built to withstand up to 5,000 G shocks, protecting your data wherever you take it. ## Overview The Seagate Expansion 640 GB USB 2.0 Portable External Hard Drive offers a sleek, lightweight, and shock-resistant storage solution powered directly via USB. With a 5400 RPM spindle speed and 8MB cache, it delivers reliable, quiet, and energy-efficient performance. Plug-and-play compatibility with Windows ensures hassle-free setup, making it an ideal choice for professionals needing portable, high-capacity data storage without extra power adapters. ## Description PRTBL EXT DRIVE 5400.1 5400RPM 8MB CACHEPrimary InformationHard Drive Type : External Hard Drive Capacity : TBD Hard Drive Interface Type : TBD Hard Drive / Average Seek Time : TBD Hard Drive Spindle Speed : 5400 Rpm Hard DriveBuffer Size : 8 MB Storage Controller Type : TBD UNSPSC CodeUNSPSC Code : 43201803 Review: 640 Gigs in your pocket, safe and sound! - This 640gb portable hard drive is great. In this time of expanding file sizes where a 2gb flash drive or a 40gb external is basically useless, everyone must have a big portable drive if you plan on taking HD videos with you! The Seagate 640gb Expansion drive is the answer. Despite only having 1 usb cable connector (I've seen many portable HDDs with 2) it transfers at a modest 20mb/s most of the time, which is usually plenty fast considering most USB sticks are much slower. The HDD does have a power port (where you can connect an external power supply) but I have not used it because the actual plug is not included, maybe it increases the transfer speed further? I gave this hard drive 5 Stars for durability as well, mainly because of two things. I have dropped it before (not a big height only 2 feet or so off of a bed), and we usually have the Hard Drive connected to our media pc by our television which is always in sleep mode, as with most hard drives I have, when it remains connected to the computer in sleep mode the HDD continues to spin for some reason. SO, with that I can assume its durable withstanding god knows how many hours of spinning for no reason, and that drop. I've also taken it traveling on planes and it always does fine. In the end, this is a perfect HDD to use if you need to make lots of videos portable. Its got a huge amount of space (formatted I believe it comes to 596gb) and it really is portable, durable, and easy to use! Review: Compact, Cool, and Reliable - Over the past couple of years, I have purchased five of these drives in various capacities (250 to 500 GB). I couldn't be more pleased with their small size, reliability, price, and that they self-power from a single USB port. My (Win XP/Win 7) ASUS netbook, Dell Laptop, and ASUS P8P67 Pro motherboard-based desktop's USB 2.0 ports have never complained and run flawlessly with these portable drives. I also have a 250GB unit plugged into a NetGear (N600) WNDR3700 router that serves as a network drive. Out of the box, the first step I take is to format the drive (NTFS, 4096 byte allocation size) and give the drive a unique volume name. For a 500GB drive this takes about 6 hours to complete. I consider this long format process to be a burn-in test for the new drive. I have never used any of the supplied Seagate software. I don't have any bench-marking software to test the data read-write speed of these drives. Normally, a Windows system image backup of 75-100 GB takes about 2-3 hours. Formatting a 16 GB TrueCrypt AES-128 bit (FAT) container volume takes about 6 minutes (30-50 MB/s). The only minor issues I have with these drives is that the specialty 18" USB 2.0 cable could be a bit longer (I use an desertcart Basics USB extender cable) and the shiny black case is a finger-print magnet. I see where Seagate now offers a higher speed USB 3.0 interface with the same small lightweight foot-print. Hopefully, those will prove just as reliable as their older USB 2.0 models. ## Features - The drive is powered from the USB cable, so there is no need for an external power supply - Plus, it is automatically recognized by Window operating system, so there is no software to install and nothing to configure - Saving files is easy too, just drag-and-drop.It's not just easy to use, but it's fast and energy efficient too ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B002OJTR6I | | Additional Features | Portable | | Best Sellers Rank | #1,558 in External Hard Drives | | Brand | Seagate | | Cache Memory Installed Size | 8 | | Color | Black | | Compatible Devices | Desktop | | Connectivity Technology | USB | | Customer Reviews | 4.5 out of 5 stars 1,192 Reviews | | Data Transfer Rate | 60 Megabytes Per Second | | Digital Storage Capacity | 640 GB | | Form Factor | 2.5-inch | | Global Trade Identification Number | 00763649017401 | | Hard Disk Description | Mechanical Hard Disk | | Hard Disk Form Factor | 2.5 Inches | | Hard Disk Interface | USB 1.1 | | Hard Disk Rotational Speed | 5400 RPM | | Hardware Connectivity | USB | | Installation Type | External Hard Drive | | Item Weight | 0.65 Pounds | | Manufacturer | Seagate | | Mfr Part Number | ST906404EXA101-RK | | Model Name | Seagate Expansion | | Model Number | ST906404EXA101-RK | | Number of Items | 1 | | Special Feature | Portable | | Specific Uses For Product | Personal | | UPC | 763649017401 | ## Product Details - **Brand:** Seagate - **Color:** Black - **Compatible Devices:** Desktop - **Connectivity Technology:** USB - **Digital Storage Capacity:** 640 GB - **Hard Disk Description:** Mechanical Hard Disk - **Hard Disk Form Factor:** 2.5 Inches - **Hard Disk Interface:** USB 1.1 - **Installation Type:** External Hard Drive - **Special Feature:** Portable ## Images ![Seagate Expansion 640 GB USB 2.0 Portable External Hard Drive ST906404EXA101-RK - Image 1](https://m.media-amazon.com/images/I/61zDLB8D9VL.jpg) ![Seagate Expansion 640 GB USB 2.0 Portable External Hard Drive ST906404EXA101-RK - Image 2](https://m.media-amazon.com/images/I/613vzcB3LkL.jpg) ![Seagate Expansion 640 GB USB 2.0 Portable External Hard Drive ST906404EXA101-RK - Image 3](https://m.media-amazon.com/images/I/61n15CJvRtL.jpg) ![Seagate Expansion 640 GB USB 2.0 Portable External Hard Drive ST906404EXA101-RK - Image 4](https://m.media-amazon.com/images/I/61ldLWWVcdL.jpg) ![Seagate Expansion 640 GB USB 2.0 Portable External Hard Drive ST906404EXA101-RK - Image 5](https://m.media-amazon.com/images/I/61AK5IKzgfL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ 640 Gigs in your pocket, safe and sound! *by B***S on May 11, 2011* This 640gb portable hard drive is great. In this time of expanding file sizes where a 2gb flash drive or a 40gb external is basically useless, everyone must have a big portable drive if you plan on taking HD videos with you! The Seagate 640gb Expansion drive is the answer. Despite only having 1 usb cable connector (I've seen many portable HDDs with 2) it transfers at a modest 20mb/s most of the time, which is usually plenty fast considering most USB sticks are much slower. The HDD does have a power port (where you can connect an external power supply) but I have not used it because the actual plug is not included, maybe it increases the transfer speed further? I gave this hard drive 5 Stars for durability as well, mainly because of two things. I have dropped it before (not a big height only 2 feet or so off of a bed), and we usually have the Hard Drive connected to our media pc by our television which is always in sleep mode, as with most hard drives I have, when it remains connected to the computer in sleep mode the HDD continues to spin for some reason. SO, with that I can assume its durable withstanding god knows how many hours of spinning for no reason, and that drop. I've also taken it traveling on planes and it always does fine. In the end, this is a perfect HDD to use if you need to make lots of videos portable. Its got a huge amount of space (formatted I believe it comes to 596gb) and it really is portable, durable, and easy to use! ### ⭐⭐⭐⭐⭐ Compact, Cool, and Reliable *by P***G on September 16, 2011* Over the past couple of years, I have purchased five of these drives in various capacities (250 to 500 GB). I couldn't be more pleased with their small size, reliability, price, and that they self-power from a single USB port. My (Win XP/Win 7) ASUS netbook, Dell Laptop, and ASUS P8P67 Pro motherboard-based desktop's USB 2.0 ports have never complained and run flawlessly with these portable drives. I also have a 250GB unit plugged into a NetGear (N600) WNDR3700 router that serves as a network drive. Out of the box, the first step I take is to format the drive (NTFS, 4096 byte allocation size) and give the drive a unique volume name. For a 500GB drive this takes about 6 hours to complete. I consider this long format process to be a burn-in test for the new drive. I have never used any of the supplied Seagate software. I don't have any bench-marking software to test the data read-write speed of these drives. Normally, a Windows system image backup of 75-100 GB takes about 2-3 hours. Formatting a 16 GB TrueCrypt AES-128 bit (FAT) container volume takes about 6 minutes (30-50 MB/s). The only minor issues I have with these drives is that the specialty 18" USB 2.0 cable could be a bit longer (I use an Amazon Basics USB extender cable) and the shiny black case is a finger-print magnet. I see where Seagate now offers a higher speed USB 3.0 interface with the same small lightweight foot-print. Hopefully, those will prove just as reliable as their older USB 2.0 models. ### ⭐⭐⭐⭐⭐ Well Worth the Money....Why? Read on...... *by D***K on February 17, 2010* UPDATES IN THE LAST PARA I have clarified a few things that other reviews had issues with and gave it a low rating. For Starters: Since I use Both Mac & PC, I can 1000% say that it works on both these operating systems. Some customers had issues with the drive going into sleep mode after 10 mins or so. Well, the copying process does not stop, just because the drive has gone into SLEEP mode. You can take this SLEEP feature off by: Process 1: Downloading a Free Seagate Manager program available on the Seagate website. (I did not do this, I used process 2, described next) OR Process 2: Formatting the drive and remove the pre-installed Seagate software. Then the drive will NOT go to SLEEP Mode. How to Format a Drive in Windows: Plug the Drive --> Go to My Computer --> Right click on the Seagate icon--> Click "Format" How to Format a Drive in Mac 10.4 or earlier: Open Macintosh HD --> Click Applications --> Click Utilities --> Open "Disk Utility" --> Select the Seagate disk listed on the Left Side --> Click "Erase" tab --> Choose Volume Format to "MS-DOS" (I chose this so that I can use it on Windows & Mac). (For the newer MAC 10.6.1 or later, I guess Format is : "Mac OS Extended (journaled)", as rightly pointed out to me by a learned customer IB...Thanks dude!) Design: Compact & Sleek. Little bigger than the iPhone, but lighter than the iPhone (8GB) Connection: NO A/C Power outlet needed. Only single USB port is needed, everything provided in the box. So you just take it out and plug it and use it. Compatibility: Both PC & Mac. Although on the box it says "FOR PC", it was detected by my MAC and will work with both. Size: Though it says 500GB, we get 465.35GB. And this is the case with most hard drives. Speed: Forget about the specifics - it is FAST!! Well worth your money, right!!! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~UPDATE~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Many customers have asking me why the format process did not work for their Mac? The reason is, I have a Mac version 10.4.1 and I clarified that in the review.I guess there are a few changes for 10.6.1 and I added that too. If your MAC OS does not fit the description, the best way to start is by finding out OS version of your MAC & then search online on how to format it OR take it to an apple store. Basically, the STEPS on how to format remain the SAME. But you might find some different Volumes Format based on your OS version. Volume Format will change as new Operating Systems (OS) keep sprouting. When I bought this drive, there was not a single review which spoke about MAC Compatibility, let alone the other issues. But I took the risk and bought it for $100 or so. Also, if you compare other reviews vs. mine. My review does not speak about how many songs I have on my drive, who gifted me this, how my life has changed with the new drive, how my office folks like it, how it fits in my pocket although the it is a trouser from my high school. No offense, they are good individually. What I mean is....one review answer about plug n play....another spoke about light weight (by how much they didnt say)...another complained SLEEP issue...But none answered MAC compatibility, Format, Weight etc My review has even answered everything that can happen with this drive. (Except that "What will happen if it breaks down" :P ) ## Frequently Bought Together - Seagate Expansion 640 GB USB 2.0 Portable External Hard Drive ST906404EXA101-RK - Seagate Portable 2TB External Hard Drive HDD β€” USB 3.0 for PC, Mac, PlayStation, & Xbox -1-Year Rescue Service (STGX2000400) - UGREEN 10 Gbps Micro B to USB C Hard Drive Cables, 1.5FT USB C to Micro B, External Hard Drive Cable Compatible with MacBook Pro/Air, iPad/Tablet, iPhone, Samsung Galaxy S24, WD Seagate etc --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sn/products/24923784-seagate-expansion-640-gb-usb-2-0-portable-external-hard](https://www.desertcart.sn/products/24923784-seagate-expansion-640-gb-usb-2-0-portable-external-hard) --- *Product available on Desertcart Senegal* *Store origin: SN* *Last updated: 2026-05-23*