An operation method for an electronic device is disclosed. The operation method for an electronic device according to an embodiment may comprise the steps of: configuring a block layer for virtualizing a storage on a volatile memory as a block device; storing a file in the configured block layer in units of blocks; selectively encoding, in a unit of at least one block, the file which has been stored in units of blocks; and storing at least one of an encoded block and a non-encoded block in the storage.