BU to Partly filled External Drive?
Looking to purchase ATI 2016 Computer Experience: 1 rung above newbie, I have read that instead of clone, full backup is recommended. Does my external HDD have to be reformatted ? Or can i backup to a partly filled disk? W7 I want to BU entire computer, with OS about 70-80 Gb, 400,000 image files. Thanks

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Thank you kindly, Thomas. Free Space would be 300Gb Backup 80Gb? roughly. 1Tb drive. I'll be purchasing ATI in the New Year, and may buy a dedicated 2Tb drive as well. I was originally going to "clone" each backup, but a poster on Whirlpool has found me an backup image software that saves in natural format which is super. (it backs up only altered files saving me hours) I still need to clone at least once in case of HDD failure. Happy New Year Thomas.
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If you make a "Disk Image Backup" then cloning is not needed. A disk image backup, the preferred method, can be used to restore your system in the event of a HDD failure. Cloning will work but can sometimes be less than satisfactory and is only a snapshot of the disk at a specific point in time. I reccomend using a regularly scheduled "Disk Mode" backup. See https://forum.acronis.com/forum/3426 Grover's Gudies for examples.
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