## Common ground
Both options refer to solid state drives (SSDs), which are storage devices that use flash memory to store data without moving parts.
## Options at a glance
**8471.70 – SSDs for computers**
- **Defining trait:** Designed primarily for integration into computers, typically using standard interfaces like SATA or NVMe.
- **Typical examples:** Internal laptop SSDs, desktop SATA SSDs, M.2 NVMe drives for PCs.
- **Best fit when:** The SSD is intended for use in a computer system (e.g., as a boot drive or storage upgrade).
**8523.51 – SSDs not for computers**
- **Defining trait:** Not specifically designed for computers; may be used in industrial, automotive, medical, or embedded systems.
- **Typical examples:** SSDs in drones, surveillance cameras, industrial controllers, or ruggedized devices.
- **Best fit when:** The product is built for non-computer applications with special environmental or durability requirements.
## Key differences
| Feature | 8471.70 – For computers | 8523.51 – Not for computers |
|-----------------------|-------------------------------|----------------------------------|
| Primary use | General computing devices | Specialized or embedded systems |
| Interface standard | SATA, NVMe (common PC standards)| May use non-standard or custom interfaces |
| Environmental rating | Standard consumer-grade | Often ruggedized or industrial |
## How to choose
- Is the SSD designed for use in a desktop, laptop, or server? → 8471.70
- Is it built for harsh environments (e.g., extreme temperatures, shock) or non-computer systems? → 8523.51
## Overlaps & pitfalls
An SSD may technically work in both contexts (e.g., a ruggedized drive used in a laptop). If the product is primarily intended for computers, use 8471.70. If it’s designed for non-computer applications—even if it could be used in a PC—choose 8523.51. The main function determines the correct classification. When in doubt, prioritize the **primary intended use**