Checks the modification age of a directory hierarchy to locate stale backups.

TDMS is a binary file format for measurement data. It was created by National Instruments. National Instruments software such as LabVIEW, DIAdem, and Measurement Studio support reading and writing TDMS files. NI also provides a DLL written in C for using TDMS files on Windows. RubyTDMS provides a convenient way to work with TDMS files on Unix-like platforms. The RubyTDMS gem was formerly known as "TDMS".