The Latitude 15 E5550 has a better storage medium than most medium processor core laptops that have been on the market for a similar time to it. This DELL notebook PC has an SSD storage medium, whereas most similar spec portable PCs that are a comparable age to it have an HDD storage medium. Solid State Drives (SSD) store data in semiconductors on a circuit board rather than using magnetic or optical media. Solid State Drives have no moving parts which makes them very fast and reliable.
An SSD storage medium is in fact the best storage medium across all notebook PCs of a comparable type and age to the Latitude 15 E5550.
The worst storage medium amongst similar types of portable PC is HDD.
We compared this laptop to all the other notebook PCs that have an SSD storage media and we think the Fujitsu Lifebook U745[plb_3000568_price] which has better reviews; or the Toshiba Tecra Z40[plb_2355836_price], the Lenovo L450[plb_2800034_price], and the DELL Latitude 12 E5250[plb_2854767_price] which is cheaper are also worth considering.