Is there any way using the luckyBackup application to backup the same directories and files to two different USB hard disks in the same task, instead of adding two different tasks? It will speed up a lot my backups.
unfortunately there is no (direct*) way to use 2 different destination folders within the same task.
Each task will first calculate differences between one source & one destination and then proceed to data transfers accordingly.
* If your goal is to increase the backup disk redundancy, consider using some kind of disk raid.