Dec 28th I installed RVS Premium Beta and it's working fine. Jan 9th I updated my secondary FDISR snapshot and I noticed it took an unusually long time. I discovered that my C drive used space had increased by 10 GB and I pinned it down to RVS. (C:Returnil) In the disk cache mode is where the 10 GBs are. In the memory cache mode it is only 2.25 MB. In RVS Premium (not the Beta) the figures are 5 GB disk and 1 MB memory. No doubt I need some education here!