I have one of those pcmcia SRAM card 2mb that i used to flash usr2450 routers with linuxap back in 2000, in the pre-openwrt days. One of the few distro to support it for the Demolinux livecd ...

The technology behind SD cards is based on flash memory, which retains information securely even without a power supply. Nevertheless, even this technology has its limits. The electrical charges ...