Loop Recorder is PC software ( http://www.looprecorder.de ) It is $29.95 to register the standard version. The $250 pro version has auto-archiving built in (as well as other features like auto-vox), but a VBS script (sample available on-line) can make the standard version accomplish the same thing via a repeated launch of an instance with a set recording span followed by close + autosave. This lets you have it produce uniquely named files of a specified duration for as long as the script is running.
It can also be set to record from internet based audio sources (pretty much recording what ever you can send to PC speakers).
I run an open ended instance of the standard version while operating, it uses the TS-590S usb audio as input & provides a constant 30 minute loop I can review as wanted (via the internal editor) without interfering with the recording process.
Nick