SSD vs HDD
Side-by-side comparison, when-to-use-each guide, and instant conversion. Reviewed for 2026.
OS drive, application drive, anything performance-sensitive. All laptops.
Backups, media archives, low-budget bulk storage, NAS storage where read speed isn't critical.
| Aspect | SSD | HDD |
|---|---|---|
| Read speed (typical) | 3,500 MB/s (NVMe) | 150 MB/s (7200rpm) |
| Cost per TB | Several times HDD; prices volatile | Much cheaper per TB |
| Power use | 2-5W | 6-10W |
| Failure mode | Sudden, often without warning | Gradual, often gives warnings |
| Lifespan | 100s of TB writes | Years of normal use |
Frequently asked
Are SSDs less reliable than HDDs?
Modern SSDs have similar or better real-world reliability for normal use. HDDs are more reliable for write-heavy workloads at the same cost. Both should be backed up — single-drive failure is the risk.
Should I get an NVMe or SATA SSD?
NVMe (M.2 slot) is 3-7× faster than SATA SSD. For new computers, NVMe is the default. SATA SSD still useful for older systems without NVMe slots or as a secondary drive.
Frequently asked questions
Are SSDs less reliable than HDDs?
Modern SSDs have similar or better real-world reliability for normal use. HDDs are more reliable for write-heavy workloads at the same cost. Both should be backed up — single-drive failure is the risk.
Should I get an NVMe or SATA SSD?
NVMe (M.2 slot) is 3-7× faster than SATA SSD. For new computers, NVMe is the default. SATA SSD still useful for older systems without NVMe slots or as a secondary drive.