I’ll never forget the first time I ruined an SD card with a few hundred images that had not yet been transferred to a hard drive. It didn’t take much—just some clumsy hands as I removed it from my camera leading to the dreaded “unreadable card” message from my camera. It hurt. There have been plenty of corrupted and faulty cards since then—sometimes all it takes is a card getting too hot to render it useless.
Sony hopes to change that with its TOUGH UHS-II SD, meant to withstand gnarly locations in addition to clumsy photographers. The new cards are ultra-rugged, waterproof and dustproof. They are also the first SD card to use a totally sealed monolithic structure (conventional SD cards are made of 3 pieces) to help keep your image data safe from the elements.
The redesigned cards are also lack fragile plastic ribs over the connectors and a write protection switch—the things most likely to break down over time and mess up card readers or card slots in cameras. X-rays, magnets, static, extreme temperatures (within reason), and UV rays also can’t penetrate the tough shell..
In addition to being sturdier than your average SD card, they’re also very fast. The new line has read speed of up to 300MB/s.