SDSDAF3/F4 Industrial-Grade SD™ Cards SanDisk SDSDAF3/F4 Industrial-Grade SD™ Cards capture data locally as primary or backup storage and help to maximize network efficiency. These SD cards enable systems to analyze data and act on results in real-time. The SDSDAF3/F4 SD cards are designed and tested to withstand the most demanding conditions and feature mechanical switch write-protection and advanced memory management firmware. These SD cards deliver lower system Total Cost of Ownership (TCO), provide reliable local backup, and reduce the network traffic. The SDSDAF3/F4 industrial-grade SD cards maximize the system availability with health status meter that ensures timely preventative maintenance. Typical applications include industrial PCs, gaming consoles, GPS, printers, factory automation, and agriculture.