Booting Windows from an SD card is generally not recommended due to several key reasons:
Performance Issues: SD cards typically have slower read/write speeds compared to SSDs or even traditional hard drives. This results in poor system performance, especially during boot and when running programs.
Limited Endurance: SD cards have a limited number of write cycles before they wear out. Windows performs frequent read/write operations (paging, updates, logging), which can quickly degrade the SD card.
Compatibility: Not all SD cards or card readers are optimized for booting. Some BIOS/UEFI firmware may not support SD card booting or may experience issues detecting the card consistently.
Reliability: SD cards are prone to data corruption, particularly when subjected to high I/O workloads. This can lead to system crashes or data loss.
For better performance and reliability, it's best to use an SSD or hard drive for running Windows.