I use Win7 Home Premium, 64bit. I used 'create a system image' on the backup/restore control panel a few weeks ago, to write an image to an external drive (I:\). Today, I did it again. But, afterward, I see that the latest image is the only one I have. The documentation in Win7 says it won't delete the old ones until I get short on space. I have about 590G free, so that's not why it deleted the old image.
Further reading in the docs, I find that it won't save but one image IF you are using a "Network" drive. Well, I'm connected directly to my ISP by cable modem (no router) so the recommendation when I first set up was to use the "Public Network" type. Other than that designation, I have NO network, whatsoever. Is that what Win7 backup is looking at, and using to determine if I am using a "network" drive? If not, why would it not keep more than one image backup? Thanks.