unless your house burns down (don't laugh, I live in Southern California - about 1,000 folks found out first hand how real that concern should be for everyone).
I mean having a local backup drive is all fine and good. So my question is, will time machine and two external drives support this approach? Will time machine happily let me swap external drives monthly? What I like about this approach, is that maximum amount of data at risk (ever) is 30 days. At the end of the month, I disconnect which ever drive I have at home, take it to work, bring the work drive home, connect it, then use that drive for the next month's worth of backup. One lives at home one lives at work (for potential disaster recovery). I have a practical question about time machine.Ĭurrently, my ultra-paranoid backup strategy (on my PC) is to use two identical external USB drives. The amount of space you want for TM really depends on how much your data changes. To the point of your drive, you can use half the drive for TM and just keep half the drive as an external drive, if you want.
OTHER VS BACKUP ON EXTERNAL HARD DRIVE TIME MACHINE PC
I'm about to switch over from a PC to an iMac. Time Machine is almost, by itself, worth the switch to a Mac. I would say at minimum you should get one either the same size as your main drive or one that is twice as big as the amount of disk space you are using. It's not a bad idea to get a drive at least as big as your current drive but that is by no means a minimum. You need to take into consideration the files you will be changing often when determining how much space you need. While music/movie files may be large, they don't change often so odds are Time Machine will only have one copy of this file in its archive. If you are daily changing 100 MB photoshop documents a larger hard drive is probably needed. Time Machine will keep old files you delete/change so if you are changing/deleting small files all the time your extra space doesn't need to be large. Your external hard drive should be as big as the files you need to back up at least and then some more to be able to go back a few months if need be. Granted if I have a 500GB hard drive for Time Machine (which I do) I will be able to retrieve files from 10 years ago probably (in the future!) but at that point the files aren't really deleted, they're forgotten. A simple solution to this storage dilemma is to backup an iPhone, iPad, or iPod touch to an external hard drive instead, where disk space is often more. Your Time Machine hard drive doesn't need to be as big as your main hard drive, only as big as the files you want to back up. If it wasn't for iTunes a 50 GB drive would probably be sufficient. For instance without my iTunes stuff I have about 30 GB of total data on my main 500 GB drive.
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