TEAMGROUP Vulcan Z SATA 2TB QLC

Only the specifications this product actually carries.

SATA

SATA (Serial ATA) is the older storage interface, capped at roughly 550 MB/s for SSDs. SATA SSDs come in the 2.5-inch drive shape or as M.2 SATA modules, and they remain useful for older systems, secondary storage, and machines without spare NVMe slots. SATA's traditional price advantage over NVMe has narrowed, so a SATA drive is worth buying on its own price history rather than on the assumption that it is the budget option.

2.5-inch

A 2.5-inch drive is the laptop-sized rectangular case that SATA SSDs share with laptop hard drives, connected by separate SATA data and power cables. It fits any system with a SATA port and a drive bay. 2.5-inch SSDs are the simplest upgrade path for older desktops and laptops, and they are the form factor most often bought as bulk secondary storage.

QLC

QLC (quad-level cell) flash stores four bits per cell, which lowers cost per gigabyte at the expense of slower sustained writes and lower rated endurance. QLC drives perform well for game libraries, media, and general storage, where reads dominate. For scratch disks, video editing, or heavy daily writes, TLC is the safer choice. In a market where every gigabyte costs more, the QLC discount is real money, and it is worth knowing which type a drive uses before comparing prices.

SLC cache

Most TLC and QLC SSDs reserve part of their flash to operate in a fast single-level (SLC) mode as a write cache. Writes are quick until that cache fills, after which speed drops to the drive's native rate, sometimes sharply on QLC drives. Advertised write speeds usually describe cache speed. The cache size and the speed after it fills matter for anyone regularly copying large files.

Sequential read and write speeds

The headline speeds on an SSD listing, such as 7,450 MB/s read, describe large sequential transfers under ideal conditions. They are the numbers that separate PCIe generations, and they are the least representative of everyday use, where small random reads dominate and most modern drives feel similar. Two drives with different headline speeds but the same generation and NAND type usually perform indistinguishably for gaming and desktop work.