They may need formatting.
I always used these cards. I'm my option, they are the best. Used a few times and and still working great. The Transcend 16GB 133x Compact Flash card memory card is specifically designed to fit DSLR cameras, offering ample storage capacity for capturing high-quality photos and videos. With its CompactFlash I format, it ensures compatibility with a wide range of camera models. As a reputable brand in the memory card industry, Transcend guarantees reliable performance and durability, making it an ideal accessory for photographers looking to expand their camera's memory capabilities.
Transcend 256MB compact flash card, 45x speed, wiped and formatted.
Transcend CompactFlash 133 (CF) Card (4GB storage capacity). All CF cards are blank, newly formatted (exFAT by default) and ready to use .
Impressive 133x transfer performance. Flash Type MLC NAND flash. Storage Capacity 8 GB. Read Speed (Max.). Write Speed (Max.).
Transcend Compact Flash Memory Card CF300 2GB Industrial
Capacity 128MB / 256MB / 512MB / 1GB / 2GB / 4GB / 8GB / 16GB. 1 x Transcend 128MB/2GB/4GB/ 8GB. Compact Compact Flash card. Interface (connector) Compact Flash, 50P. Power protection prevents data loss during sudden power failure.
Transcend's Compact Flash Card (133x) targets users who demand superior performance at a lower price. This series is suitable for both photo enthusiasts and professional photographers. 1PC x Transcend CF Card 133X.