Final Considerations The choice of a format and device type depends on many factors, including the kinds of data you need to back up, the range of file sizes, the daily volume, and the quantity and speed of the hard drives youll back up from. If you have excessive data and a small backup time window, LTO or SDLT may be the best solution. If you need to restore files frequently, AIT-3 may be the answer.Weve reviewed five external single-tape drives and five automated products for small to midsize businesses. The standalone drives range in price from $4,225 to $5,775, while the automated solutions range from $7,500 to $13,000. AIT-3, LTO, and SDLT products are all represented in both the single-drive and automated-device categories.