Bar indicating drive space usage becoming RED.

One thing I'd totally love (and for which I could do another donation) is to tweak the percent of a HD drive before the bar in expolorer indicating space usage is visualized in RED (indicating low space). The bar becomes red when less than 10% are left on the drive. With modern HDs, that would be about 100Gb! It would be nice to be able to set this really annoying visual alarm by an adjustable: 1. fixed amount and/or 2. a percent. Thanks sooo much, and congratulations for this fantastic tool!!!