How To Identify and Upgrade an HP ProDesk 400 G3 SSD

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If you have a friend with an HP Prodesk 400 G3 SFF business computer (product code T4R70ET#ABU), and their 128GB Samsung SSD is almost full, upgrading to a larger SSD is a good solution. This guide will help you understand how to do it easily and confirm what type of SSD is compatible.

First, the machine originally comes with a Samsung 128GB SSD. If you want to upgrade it, a good choice is a Samsung 870 EVO in either 500GB or 1TB capacity. This will give your friend more space to store files and run their business smoothly until they’re ready to get a new computer.

When you check the current SSD in the machine, you might notice that in the Device Manager, it isn’t listed as an SATA SSD. Instead, it appears as “MZ7LN128HCHP-000 SCSI Disk Drive.” This can be confusing because most expect SSDs to be labeled as SATA drives. However, many modern SSDs show up as SCSI devices, especially if they are connected via a particular controller or adapter.

What does this mean for you? Simply: the physical connection and compatibility are standard for most 2.5-inch drives, including the Samsung 870 EVO. The main thing to verify is the physical size and interface. The HP Prodesk 400 G3 SFF uses a standard 2.5-inch SATA drive, so a new SSD of this type will fit right in.

Before you buy the new SSD, it’s a good idea to open up the computer. Usually, you’ll need a small Phillips screwdriver to remove the side panel. Once open, locate the existing SSD—it’s typically attached to a sled or bracket inside the case. Carefully disconnect the cables and unscrew the drive. Take note of how it is mounted so you can install the new SSD in the same way.

After removing the old SSD, install the new Samsung 870 EVO into the same slot. Connect the SATA and power cables, secure it with screws, and close the case. When you power up the computer again, you’ll need to install an operating system on the new SSD or clone the existing drive if you want to keep everything as it is.

In summary: yes, you can upgrade your friend’s HP Prodesk 400 G3 SFF with a larger SSD, like the Samsung 870 EVO. Regardless of how the drive appears in device management, the physical interface is standard, so a compatible 2.5-inch SATA SSD will work fine. Just make sure to open the case carefully, swap out the old drive, and you’re good to go!