Question here -- so the cable replacement should be performed only if you have issues, not in general, right? I am about to replace the SSD I put into an early 2011 MBP with a new SSD. The old one works great still, no issues, so I assume it won't be any different with the new one.
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=== Update (09/11/2018) ===
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Just a few days ago I replaced the HDD in an early 2011 MBP with a Samsung EVO 860 SSD, and it works flawlessly. I also didn't have to replace the HDD cable as is stated elsewhere here (I suppose it only needs to be replaced if it's faulty). I used Carbon Copy Cloner (free trial) for cloning the old boot HDD onto the new SSD from a live system. Super easy.
Question here -- so the cable replacement should be performed only if you have issues, not in general, right? I am about to replace the SSD I put into an early 2011 MBP with a new SSD. The old one works great still, no issues, so I assume it won't be any different with the new one.