Quote:
External SSD
It's not until I came onto these forums that I discovered the use of an external drive to write data onto, to refrain from overworking the main drive. I'm looking for something around the following details:
7,200 RPM - 64 MB cache - 300 or more MB/s
A user suggested a: Samsung 850 EVO 500 GB 2.5 inch Solid State Drive, into a Sabrent 2.5-Inch SATA to USB 3.0 Tool-free External Hard Drive Enclosure
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The best performing/easy to use storage you can get on a modern iMac is the internal PCIe SSD. That is faster than multiple separate external SSDs (well SATA based SSDs at least). You can ignore usual advice about needing multiple separate drives with these modern very fast 4 lane x PCIe 3 SSDs. So max out the SSD in the iMac when you order it. Yes just pay the Apple tax here, it's worth it. And especially do not order an iMac with a Fusion drive. They can be problematic, and are just a bad idea.