So I'm not entirely sure, but I think my SanDisk 128gb micro SD card is corrupting the files stored on it. It's a brand new card, only took it out of the packaging and tried using it a few days ago. I was downloading a few things directly to it yesterday, which were stored in zip or 7z folders. After everything had downloaded and I started extracting them all, both winRAR and 7zip informed me that nearly half the folders had corrupt data. I initially assumed maybe it was the site I downloaded from, so I tried downloading the same files from elsewhere across 2 different sites, but some of those also corrupted.
I'm now assuming maybe it's my internet, it was a little spotty yesterday. I've never experienced anything like this before though, I've had failed downloads before but never corrupt ones, and they seemed perfectly fine after downloading until it came time to extract them. So I download them again today and all seems well and good after I test them in 7zip and winRAR, no errors found. But later on in the day when I have time to extract them, a handful of them are somehow corrupt again, even though I'm 100% certain they were returning no errors just hours earlier. The only change I made was that I did move some of them into a new folder after testing, but one file remained in the same location before and after extraction since yesterday, and is now apparently corrupt AFTER it's already been unzipped (according to 7zip, the file looks fine otherwise on windows explorer).
I'm at a loss now, I can only assume that somehow the SD is corrupting the files? In all my years of using computers and technology, I've never seen this before, fortunately have never had an SD card or HDD crap out on me yet, and I've never seen corrupt data like this before.
I don't believe it's fake, I have several of the same SD card I've bought from the same place, and I've had 2 different ones in use for 1-2 years now that have never had any issues. Also used another one just a few days ago, brand new, and had no issues. I've used H2testw and it has the correct amount of storage space, and I've tried writing and verifying it about 4-5 times with about 5-10gb of storage each time now and it isn't turning back any errors. I know I should ideally re-format it and test it, but I have yet to try that as I haven't had the time. I've also tried the standard error checking function on Windows for the SD card, but that doesn't find anything. The card is formatted as exFAT.
I would like to rule out any issues that are perhaps somehow on my end before I try returning the SD card. It's very bizarre and I honestly don't know what the issue could be. Are there any other tests I can perform the SD card to verify its integrity?
I'm now assuming maybe it's my internet, it was a little spotty yesterday. I've never experienced anything like this before though, I've had failed downloads before but never corrupt ones, and they seemed perfectly fine after downloading until it came time to extract them. So I download them again today and all seems well and good after I test them in 7zip and winRAR, no errors found. But later on in the day when I have time to extract them, a handful of them are somehow corrupt again, even though I'm 100% certain they were returning no errors just hours earlier. The only change I made was that I did move some of them into a new folder after testing, but one file remained in the same location before and after extraction since yesterday, and is now apparently corrupt AFTER it's already been unzipped (according to 7zip, the file looks fine otherwise on windows explorer).
I'm at a loss now, I can only assume that somehow the SD is corrupting the files? In all my years of using computers and technology, I've never seen this before, fortunately have never had an SD card or HDD crap out on me yet, and I've never seen corrupt data like this before.
I don't believe it's fake, I have several of the same SD card I've bought from the same place, and I've had 2 different ones in use for 1-2 years now that have never had any issues. Also used another one just a few days ago, brand new, and had no issues. I've used H2testw and it has the correct amount of storage space, and I've tried writing and verifying it about 4-5 times with about 5-10gb of storage each time now and it isn't turning back any errors. I know I should ideally re-format it and test it, but I have yet to try that as I haven't had the time. I've also tried the standard error checking function on Windows for the SD card, but that doesn't find anything. The card is formatted as exFAT.
I would like to rule out any issues that are perhaps somehow on my end before I try returning the SD card. It's very bizarre and I honestly don't know what the issue could be. Are there any other tests I can perform the SD card to verify its integrity?