// sort the backup files (based on integer found in the suffix) using a
// precomputed Hashmap for speed
// sort the backup files (based on integer found in the suffix) using a
// precomputed Hashmap for speed
// sort the backup files (based on integer found in the suffix) using a
// precomputed Hashmap for speed
// sort the backup files (based on integer found in the suffix) using a
// precomputed Hashmap for speed