I'm looking to compress my files and upload it to Google Drive. Which format do you use that's proven to be reliable and secure? Windows 7 has a built-in zip software but I am leery of it. I've used it to decompress a bios file which seemingly went OK until I actually tried to update my motherboard bios. The motherboard complained the bios file was incompatible. I then used Winzip to decompress the same file and my motherboard accepted the bios file. How do you explain that?