The destination filename of the file to copy or move. Include any path as required, but the storage type is not necessary. For any operation other than a file deletion, setting a null string will return an error. For deletions, any value set to this object is ignored. Note: If the destination is set to flash, card or nvs, any file at the destination that shares the destination filename will be overwritten by a move or copy operation. The destination filename does not need to be the same as the source filename. For example, to copy a release file from the TFTP server to the local flash into the backuprelease directory, you would set: backuprelease/latest.rel