Connect two SD cards to one Arduino board and copy from one to another I'm trying to connect 2 SD cards to an Arduino Uno board.

My first question is: Is it possible to connect two SD cards to one Arduino simultaneously?
The second question is: If it is possible to connect 2 SD cards, How can I copy card 1 data to card 2

My project goal is to copy data from one peripheral memory to another peripheral memory when an external interrupt occurs.
Can anyone help me please ?
You can't do it with your Arduino-Uno (and usual SD libraries).
SD cards are organized in 512 byte &quot;sectors&quot;. You need at least one sector for the file system itself and one sector for the data. If you try to have two files open simultaneously, all your 2048 bytes RAM are required for the SD buffers and you can't return from the file open() call any more.