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Customer Review

Reviewed in the United Kingdom on 6 November 2018
Write speed started at 40 MBytes/second, dropped to around 12 MBytes/second within a couple of minutes, and gradually dropped to 5.65 MBytes/second the more the drive was getting filled with data. It took 1 hours, 26 minutes and 25 seconds to finish copying 28.5 GB of data.

I was then able to read the files back at a steady 104 MBytes/second in 4 minutes and 41 seconds. This is where the good news end, as the card died immediately after I formatted it, and it is now in a permanent "write protected state" (I tried it on different computers, Operating Systems, even on my phone, and the card is really stuck in read only mode).

So in the end this fine product - son of a cheap manufacturing process - died in less than 2 hours. This makes me very sad, especially when I think about the fact that the first 1GB drive I bought 12 years ago still works fine as of today (as it was probably using a now "premium" SLC NAND flash).

Given the price, Sandisk most likely used a crappy TLC NAND flash that could not cope with being used "too much, too soon".

The fact that Sandisk also offers a complimentary 1 year subscription to Rescue PRO Deluxe, does not help with the feeling that the controller within the drive is just giving us the illusion that our data is actually stored properly, when the whole drive could actually crap out at any time.

At least I did not put sensitive data on it, so I can return it with peace of mind.
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