backup software
noun [ U ] uk/ˈbæk.ʌp ˌsɒft.weər/ us/ˈbæk.ʌp ˌsɑːft.wer/
（计算机）备份软件
computer programs that automatically create copies of the information on a computer system so that it can be stored separately and used to replace the original information if it is damaged or lost