Definitions for "Tape Backup"
A duplicate on magnetic tape of the information on a hard disk. The alternative to tape backup is copying onto a second hard disk which is pretty expensive or copying dozens of 3.5-inch disks which is time-consuming.
an example of the least expensive backup media option for the market today
Three main tape storage formats are DAT (Digital Audio Tape), DLT (Digital Linear Tape) and LTO. The latter two offer the greatest storage capacities. The availability of automated tape libraries significantly expands the overall storage capacity.
a possibility if it's more cost effective than other solutions
Keywords:  onto, key, backed, point, data
Key data being backed up onto tapes at a given point in time.