I'm coming across the same issue as everyone else. I first got a evo 850 256gb SSD to replace a drive on an old laptop running windows 7 and it worked like a charm. In fact it worked so well that I went out and got the 500gb for my workhorse laptop (i7 processor 4th gen, 16GB ram DDR3, 1tb HDD, etc). At first I couldn't find anything, and thought it was the enclosure I was using and the driver that came pre-installed with it(which didn't effect anything on the Windows 7 cloning process), so I went out and got a SATA 3 cable connection; went through multiple help forums and discovered the disk management(just keep right and left clicking on the drives/disks and you can figure out how to see various pieces) initialize drive, format drive, create volume... boom, the drive can be discovered by my computer and by Samsung Magician, but still no luck with Data Migration.
Went through hours of trial and error setups, and tried using a 3rd party application, EaseUS(free), cloned the drive and all the data was moved over, booted up with the new drive and.... Checking Media (failed)... from what I gathered I don't have enough partitions set up on my SSD, and need the recovery, boot, main, etc(can't remember them all, I'm at work). So I go back into EaseUS and attempt to clone sector by sector(again following pages of forum help), but the program won't allow me to create partitions.
That being said, after I cloned with EaseUS, I was able to see the Samsung SSD in the data migration application, but like someone else said, I see both my original HDD and the Samsung SSD both labeled as Samsung SSD, and the migration tool won't let me clone from there
Right now, I'm pissed off. My next attempt is to try using Macrium as a few people have said that this would work. Apparently some other reads said that the Samsung Software hasn't been updated for Windows 10(c'mon it's been out almost a month already j/k), and that's why the Migration tool isn't working.
Regardless, if anyone else has an answer, please let me know, because I really want this thing to work after I saw the improvements the small drive gave me on the older laptop. If Macrium works, I'll let you guys know, but at this point, I'm not holding my breath.
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Update:
Find Macrium Reflect Free, run it, it will work the same way the Data Migration tool will. It allows you to add/copy partitions as needed. My SSD is working now, but I am getting a DPC_WATCHDOG_VIOLATION message now when I start my computer from shutdown, after a restart it works just fine, but now I'm looking into that, which appears to be an issue of needing updated drivers. Hoping it's an easy fix, but will let you guys know if it's a constant problem.
Essentially, Macrium worked really well, and it's free