Buying or replacing external storage for Macs is extremely uncertain at the moment because of issues over APFS. Here’s some guidance for selecting hard disks, for backups and more.
RAID
You may still have plenty of space on your backup volume, but if it has millions of files and hard links from years of backups, it will be very slow. Here’s how to fix that.
Hard drives are still best value for higher capacity storage. Here are some tips for purchasing them, based on vast experience.
Replacing a failed drive, or upgrading the whole array? Your choice may be wider than you think.
Sierra sticks with the old favourites like Disk Utility, but still can’t repair permissions or keychains. A new app, Storage Management, has been added.
Does the £120 Thunderbolt case outperform the £15 USB 3 one? And if you had both, which would you choose to use?
Keeping it up to date is important, but there is a slight twist (as ever).
El Capitan has made the checking and repair of storage more complex. Here is a clear explanation of what to do.
Disk Utility has a bug which can waste a lot of time trying to re-partition drives, and HFS+ creaks horribly.
How easy is it to increase the Promise Pegasus R4’s drive capacity without losing data?
The Eclectic Light Company 