The HP 440 MT has an SSD storage media which is faster than most medium processor cores personal computers that are a similar age to it. Most medium processor cores personal computers that have been around for a comparable time to it have an HDD storage media. Solid State Drives (SSD) store information in transistors on a circuit board rather than on optical or magnetic media. This has the advantage of being much faster than a traditional HDD drive.
An SSD storage media is in fact the best storage speed across all computers that have been on the market for around the same time as the 440 MT.
An HDD storage media is the worst storage speed across similar types of desktop computer.