Last week, a disk containing CSM Tech Publishing's current project manuscripts crashed. Fortunately, there was a backup, but all files that had been added or changed that day were lost. A new disk had

Last week, a disk containing CSM Tech Publishing's current project manuscripts crashed. Fortunately, there was a backup, but all files that had been added or changed that day were lost. A new disk had to be purchased for overnight delivery, and the data had to be restored. Several days of work time were lost. The owner of CSM Tech wants to know what can be done to prevent the loss of data and time if a disk crashes in the future. The server currently has two disks installed: one for the Windows boot and system volumes and one for manuscript files. The disk used for manuscript files is about one-third full. There's enough money in the budget to purchase up to two new drives if needed. What solution do you recommend, and why?