They have totally different extensions, from RAR to ZIP to 7z and lots of more, and generally the program to open them costs you. It opens all of these and more, and allows creation of recent archives.
If you’ve got plenty of e-book information, Calibre is the open-supply device you need to organize them. It converts information into totally different formats, so you can use ebooks on many various devices, with which it will also sync. It’s continuously updated with new features and assist for non-Amazon ebook reader hardware, like the units from Kobo. The commonplace, free model of this device can create a full system image, back up entire drives or particular partitions, schedule backup of information and folders you specify. Sorry, the option to clone a full drive to a different will now price you the value of the pro version.