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ctesoro Author

Level 1

4 points

how large should external hard drive be for time machine backup ?

iMac 27″, macOS 10.14

Posted on Aug 4, 2020 8:13 AM

Top-ranking reply

den.thed

Level 10

81,682 points

Posted on Aug 4, 2020 8:55 AM

2 to 3 Time the size of your Internal HD is the general rule.

Back up your Mac with Time Machine - Apple Support

You can cheat a little if you are not regularly adding a lot of media files. For example, a 1T external drive can easily backup an internal drive with 300 to 400GB of data.

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how large should external hard drive be for time machine backup ?

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