WD 3TB Elements Portable External Hard Drive - USB 3.0

Product Information

Desktop hard drives are cheaper per Terabyte, offer capacities above 20TB, usually perform better but they are much larger and require an external power supply unit.

In a nutshell, it is a storage device that contains an internal hard drive. The fact that there's two types of hard drives - 2.5-inch and 3.5-inch - means that there are also two types of external hard drives: larger desktop hard drives and smaller portable hard drives. Also know that you can find external drives that do way more than just store your data. Some include SD card readers to offload footage from a camera or drone in the field, while a few specialized models have built-in Wi-Fi and can double as a little media server, able to connect to more than one device at a time. Note that various vendors use different nomenclatures. WD confusingly has two categories - external drives and portable drives - but includes products in the latter category in the former one while archrival Seagate categorizes them as desktop drives and portable drives. You will note that they removed the word "hard" and that's for a good reason: increasingly portable drives are based on flash components and in a near future - given the rapid drop in hardware pricing - we wouldn't be surprised to see multiple SSDs combined in a "desktop drive" How to choose the best external hard drive for you The drive comes preloaded with Buffalo's "ModeChanger" utility for Windows and Mac that switches it from Open to Secure and vice-versa. Mode switching takes less than a minute and the drive must be reformatted after that. WD sales literature will tell you this stores 150 games, but game sizes vary widely. The firm puts the average size per game at 36GB while some reviewers claim it's 80GB nowadays. In any case, it's a lot of storage to expand your gaming system.The only case with hard drives where the USB standard matters much is if you connect a drive to an old-style, low-bandwidth USB 2.0 port, which is better reserved for items like keyboards and mice. (Also, if it's a portable drive, that USB 2.0 port may not supply sufficient power to run the drive in the first place, so the speed shortfall may be moot.) Any remotely recent computer will have some faster USB 3-class ports, though. If you deal with any sensible information leaving it in an unencrypted drive is risky. While encryption can be done in software with a high degree of fine-tuning, nothing beats a purely hardware-based solution that frees you from the software-configuration complexities. The 2022 iteration of the LaCie Mobile Drive is a good choice for anyone who values capacity over speed, and who appreciates a rare touch of elegance in a platter-based hard drive. It costs a tad more per gigabyte than much of its platter-based ilk, but less than SSDs of equivalent capacity. If you buy a larger desktop drive with two or more discrete spinning-platter drive mechanisms inside, you'll almost certainly have the option to configure the drive as a RAID array using included software. Depending on which RAID level you choose, you can prioritize capacity, speed, or data redundancy, or some combination thereof. (Credit: Zlata Ivleva)

Most such multi-bay devices are sold without the actual hard drives included, so you can install any drive you want (usually, 3.5-inch drives, but some support laptop-style 2.5-inchers). Their total storage capacities are limited only by their number of available bays and the capacities of the drives you put in them. The storage industry refers to these (as well as smaller-capacity externals as a whole) as DAS—for "direct attached storage"—to distinguish them from NAS, or network attached storage, many of which are also multi-bay devices that can take two or more drives that you supply. (See our separate roundup of the best NAS drives.)

Just how much faster is it to access data stored in flash cells? Typical read and write speeds for consumer drives with spinning platters are in the 100MBps to 200MBps range, depending on platter densities and whether they spin at 5,400rpm (more common) or 7,200rpm (less common). External SSDs offer at least twice that speed and now, often much more, with typical results on our benchmark tests in excess of 400MBps for the slowest ones. Practically speaking, this means you can move gigabytes of data (say, a 4GB feature-length film, or a year's worth of family photos) to an external SSD in seconds rather than the minutes it would take with an external spinning drive. How an external drive connects to your PC or Mac is second only to the type of storage mechanism it uses in determining how fast you'll be able to access data. These connection types are ever in flux, but these days, most external hard drives use a flavor of USB, or in rare cases, Thunderbolt.