If your Dell Latitude 5400 takes several minutes to boot, freezes when you open Chrome, or constantly shows 100% disk usage in Task Manager — the i5 Whiskey Lake processor and enterprise-grade chassis are still fine. The bottleneck is almost always the storage: many shipped with either a small 128GB/256GB drive that filled up fast, or a spinning 2.5″ hard drive that was never really up to the job.

At ALVA PC, the upgrade is straightforward: we replace the hard drive or SSD with a faster, larger solid state drive, and you get the same laptop back — same Windows installation, same desktop layout, same saved passwords and files. If you want to understand more, including which M.2 form factor your specific 5400 uses, our Windows SSD upgrade guide covers it in plain terms.

The Latitude 5400 name covers several configurations sold between 2019 and 2020 — from standard i5 units to vPro-enabled variants. They share the same chassis, but the exact storage setup depends entirely on which battery size Dell installed at the factory. This is the single most important thing to check before ordering any parts.

Not every Latitude 5400 owner is dealing with a slow laptop. If yours still feels reasonably quick but the drive warning keeps appearing, downloads are filling up fast, or you’re constantly moving files to an external drive — the issue is capacity, not speed. A storage upgrade solves this just as effectively: we fit a larger drive, transfer everything across, and return the same familiar machine with room to breathe.

The Latitude 5400 is a single-generation platform (Intel 8th Gen Whiskey Lake, regulatory model P98G) sold most commonly with the i5-8265U or vPro i5-8365U processor. Every unit ships with one M.2 slot, supporting both PCIe NVMe (Gen 3×2 or Gen 3×4, depending on configuration) and SATA — though any given drive supports only one of those protocols, not both. Many units left the factory with an M.2 2230 (shorter, 22×30mm) drive rather than the full-length M.2 2280, so confirming which physical size is currently installed matters, since the retention bracket and thermal cover differ between the two.

The 2.5-inch SATA bay is where things get most confusing. It exists on commonly sold variants, but only when the machine shipped with the smaller 3-cell/42 WHr battery — units with the 4-cell/68 WHr battery use that internal volume for the larger battery pack, leaving no physical space for a 2.5-inch drive. If you have the bigger battery, you have one storage slot total. If you do have the 3-cell configuration and want to add a 2.5-inch drive, you’ll also need the optional SATA cable (Dell part 0M9XKG). The WWAN slot can technically hold a secondary drive, but outcomes there are inconsistent enough that it’s best treated as experimental rather than a reliable expansion path.

Common concerns. We’ve written a detailed guide that addresses every one of these worries honestly, with research to back it up.

We check your exact battery configuration, confirm which storage slots are actually available, source any required hardware including SATA cables and mounting brackets, carry out the work, test the laptop and send video proof before any remaining balance is due. For a wider explanation, visit our main Windows SSD upgrade service page.