Memorex SDHC TravelCard 32GB Class 10. The Memorex Secure Digital High Capacity (SDHC) TravelCards is available in 32GB to meet the demands of today's digital lifestyle. Designed for use in SDHC-compatible devices, such as digital cameras, MP3 players, cell phones, PDAs, computers and camcorders, the SDHC TravelCard offers users additional flash memory to capture, save, and share photos, music, video and data from a well-known and trusted consumer brand.