Crucial BX500 4TB SATA SSD (CT4000BX500SSD1): specs and who it suits

The Crucial BX500 4TB is a 2.5-inch internal solid state drive with a SATA connection. It is designed for people who want to replace an older hard drive or add a large amount of storage to a laptop or desktop and make the computer feel quicker to start up and open files.

What a SATA SSD is

A solid state drive stores data on flash memory chips instead of spinning platters. With no moving parts, it can find and read data far faster than a mechanical hard drive. The BX500 uses Micron 3D NAND, and Crucial lists a three-year limited warranty. The model number is CT4000BX500SSD1, and the 4TB size is the capacity discussed here.

SATA is the older connection standard that many hard drives also use. Because the BX500 is a 2.5-inch SATA drive, it typically fits laptops and desktops that already have a 2.5-inch drive bay and a SATA data connection.

What up to 540MB/s means

Crucial rates the drive at up to 540MB/s. That is the sequential read speed under ideal conditions. The SATA interface itself tops out at around 550MB/s, so this drive is working close to the limit of the connection. It is much slower than modern NVMe drives, which use a different slot, but it is a big step up from a hard drive for everyday tasks.

Crucial says the drive is 300% faster than a typical hard drive and 45x more energy efficient. These are the brand's comparisons against a typical hard drive, and results vary with the system. Crucial says that the lower power use can also help laptop battery life.

Why 4TB matters

Four terabytes is a lot of room for photo libraries, video projects, game collections or backups. A large single drive avoids splitting files across several smaller ones. Crucial says it holds up to 4TB of your files. Keep in mind that a drive of any size can fail, so important files should be backed up in more than one place.

Installing it

Crucial's description says a step-by-step guide walks you through installation, even if you've never opened your computer. In general, it means mounting the drive in a bay, connecting a SATA data cable and a SATA power connector in a desktop, or swapping it into the drive bay of a laptop. Then you either copy your existing data across or do a fresh operating system install. Check your device's manual first.

Size and weight

The drive measures about 3.9 x 0.3 x 2.8 inches and weighs 0.1 lb. At 0.3 inches thick, the listed dimensions suggest a slim profile, but check your laptop's drive bay height.

Who it suits

It suits owners of older laptops and desktops that still use a hard drive, those who want a simple storage upgrade, and anyone adding secondary storage for files and games. If your computer has a fast NVMe slot and you need maximum speed, a different type of drive would match it better.

What to check before you buy

• Connection: confirm your computer has a free 2.5-inch bay and a SATA connection.
• Thickness: check that 2.5-inch slim drives fit your laptop.
• Cables and brackets: desktops may need a SATA cable and a mounting bracket, which aren't listed as included.
• Cloning or fresh install: decide how you'll move your data and operating system.
• Backups: keep copies of important files.

The short version

• A 4TB 2.5-inch SATA SSD with Micron 3D NAND.
• Rated by Crucial at up to 540MB/s.
• Aimed at faster start-up and file loading than a typical hard drive.
• Three-year limited warranty.
• Works only in systems with a SATA drive connection.

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