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APRICORN Aegis Padlock DT 2TB USB 3.0 3.5" External Hard Drive 256-bit AES Encryption ...
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DataLocker 1 TB Hard Drive External TAA Compliant DL1000PQI
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MICRONET GF3B14000EU G-FORCE3 14TB USB 3.0 / ESATA
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APRICORN Aegis Padlock DT 6TB USB 3.0 3.5" Encrypted Desktop Hard Drive with PIN Access ...
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Defender 4TB AES 256-Bit Hardware Encrypted External Hard Drive KDH3B354T
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Fantom Drives FD GFORCE 16TB USB 3.2 eSATA External Hard Drive GF3B16000EU
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Fantom Drives G-Force3 Pro 18TB Desktop External Hard Drive Black GFP18000EU3
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Transcend StoreJet 25CK3 2.5” SATA III SSD/HDD Enclosure Kit USB 3.1 Gen 1 ...
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Glyph Technologies 4TB StudioRAID Mini Portable Hard Drive (5400rpm)
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APRICORN A25-3PL256-2000 Apricorn Aegis Padlock 2 TB External Hard Drive - USB 3.0 - 5400 ...
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TOSHIBA 320GB Vivid White Portable External Hard Drive 3 Year Manufacturer Warranty ...
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Glyph Technologies Studio S4000 4TB External Hard Drive
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Oyen Digital 50TB Mobius Pro 5C 5-Bay USB-C External Drive Array
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Buslink Corporation DL-250-U2 Disk-On-The-Go DL-250-U2 250 GB 2.5" External Hard ...
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maxtor one touch ii 250 gb external hard drive with firewire and usb 2.0 e01g250
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HP 2 TB 3.5" Internal Hard Drive
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Common Questions about External Hard Drives

Introduction

An external hard drive is an excellent solution if you need to share a large amount of data, expand your computer’s storage capacity, or back up your hard drive’s contents to prevent data loss. Compared to more elaborate external data storage solutions such as tape drives or NAS devices, an external hard drive is relatively easy-to-use and requires minimal setup. Below, NeweggBusiness answers commonly asked questions about external hard drives.

How portable are external hard drives?

Portability for external hard drives can vary greatly, with some being small and handheld while others being rather large and unwieldy. Often, portable hard drives will have smaller capacities but are more compact and light weight.

The terms desktop and expansion are sometimes used to describe larger external hard drives that are primarily used to expand storage capacity or serve as backup drives. Compared to portable hard drives, desktop and expansion hard drives are available in larger capacities.

Should I get an external hard drive or network attached storage (NAS) drive?

They are both excellent options for expanding storage capacity, but utilize different methods for file sharing. To share files with an NAS drive, the recipient needs to be connected to the network or have VPN access. The advantage of a portable hard drive is that you can share files with people that are not on the same network or do not have internet access.

How durable are external hard drives?

They can vary greatly in terms of durability, but some are designed specifically to be very rugged. External hard drives marketed as MIL-STD complaint must meet stringent durability requirements set forth by the United States military. If you require a very durable external hard drive, look for a MIL-STD compliant drive.

Are there external solid state drives?

Yes, some external drives utilize solid state memory instead of hard disk drives as the storage medium. They offer great read/write performance and are not as susceptible to damage caused by sudden movements or drops.

Other than USB, what other connection options are there?

USB is one of the most common connection types for external hard drives, though other options include eSATA™, FireWire®, and Thunderbolt™. Below is a list of the maximum data transfer rates in megabits per second (Mbps) for various connection types.

Connection
Speed

USB 2.0

480 Mbps

FireWire 800

800 Mbps

eSATA

3,000 Mbps

USB 3.0

5,000 Mbps

Thunderbolt

10,000 Mbps

If I have a Mac®, do I need a special type of external hard drive?

Mac OS X® utilizes a file system called HFS+ while Windows® computers and external hard drives built for Windows-based systems use NTFS. When attempting to use a NTFS external hard drive with OS X, you will have the ability to read but not write files to the external drive.

To fix this issue, you will need to reformat the hard drive with a HFS+ file system or install an NTFS driver. These drivers may sometimes be provided by the external hard drive manufacturer. Alternatively, you can use third-party NTFS drivers.

Another common—though older—file system is FAT32. A FAT32 drive is fully compatible with both Windows and OS X operating systems, but unfortunately has a file size limit of 4 GB. If you are planning to utilize the external drive with only Mac computers, you can purchase one that comes pre-formatted with an HFS+ file system.