MicroSD Card

A microSD card is the default storage medium for a Raspberry Pi. The Pi boots from it, stores its operating system, and reads and writes data continuously during normal operation.

The write endurance problem

Standard microSD cards are rated for a finite number of write cycles. A home lab server writes data constantly: logs, application state, database records. This depletes a standard card far faster than typical consumer use. A card running a continuous server workload can fail in months rather than years.

Endurance-rated microSD cards address this directly. They use higher-grade NAND flash and wear levelling firmware designed for sustained write workloads, similar to the requirements of dashcams and security cameras. SanDisk, Samsung, and Kingston all manufacture endurance rated options. Cards marketed as Max Endurance or High Endurance offer substantially longer operational lifespans. At the time of writing, an endurance card costs only slightly more than a standard card of the same capacity.

If the card fails, the setup must be rebuilt from scratch. For a permanent home lab installation, an endurance card is worth the small additional cost.

The alternative

An NVMe M.2 drive connected via a compatible case such as the Argon NEO 5 NVMe offers significantly faster read and write speeds and a longer operational lifespan. For a home lab intended to run for years, NVMe is the more durable storage choice.