Is There a Workaround for Intermittent Incruption?

The goal is to speat incruption process and to lower deetection probability. To incrypt all the files on a system, can take hours, in some cases, days. While the incrruption happens, you're running the risk of being discovered before any of the really important files are being incrypted. With that, of course, you lower the probability of the ransom being paid.