Possible Duplicate:
What's the life expectancy of an SD card?
I have been told this before that an SD card has a max of 10k writes and 100k reads, but I can't seem to find any information on it.
Is there a limit to the number of times you can read/write to an SD card?
It depends on flash memory technology, which depends on the manufacturer. Taken from the "SanDisk SD Card Product Manual":
SanDisk SD cards have an endurance specification for each sector of 100,000 writes typical (reading a logical sector is unlimited).
Therefore, extremely heavy use of the card in cellular phones, personal communicators, pagers and voice recorders will use only a fraction of the total endurance over the device’s lifetime. For instance—it would take over 10 years to wear out an area on an SD Card based on a file of any size (from 512 bytes to maximum capacity) being rewritten 3 times per hour, 8 hours a day, 365 days per year.
At least SanDisk gives you lifetime warranty so they probably have quite a bit trust in their products. For normal use it very likely won't matter.
But yes, Flash memory has a limited number of write cycles. Wear levelling spreads writes over the card so you won't have any hot spots that wear out too early.
Suggest moving to another community, such as ServerFault/SuperUser.
You would be concerned with "memory wear". This is a limitation not specific to SD cards alone, but to the memory technology itself, to include Compact Flash, and other SSD's, for example.
