No. On the console, backup data of a DCS Redis 3.0 instance can be exported only to AOF files. To export data to RDB files, run the following command in redis-cli:
redis-cli -h {redis_address} -p 6379 [-a password] --rdb {output.rdb}
Yes. DCS Redis 4.0 and later instances support AOF and RDB persistence. You can back up data to RDB and AOF files on the console and download the files.