What's the right filesystem for your portable backup drive?
So you just bought an external hard drive for backups. Now, with what filesystem should you format it? Ext2? FAT32? No matter which one you choose, there are trade-offs to consider. You face the same choice whenever you buy a USB thumb drive, but for a backup drive, a lot more is at stake. Those backups have to be there and be reliable when disaster strikes. On the one hand, you need to preserve your data and your metadata, so not just any filesystem will do. But on the other, if you're not at your home base, you need to be able to access it from anywhere, so you can't be too obscure.
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