Review on 💽 KOOTION 20pcs 4GB USB Flash Drive Black - Swivel Thumb Drives Memory Stick Pen Drive, 4 GB by Matthew Ciula

I have bought quite a few packs of 20 from this seller but this will probably be my last, not sure if they have changed suppliers recently but there is a noticeable one difference in speed and quality. I use them for my business so I transfer the same files to these flash drives all the time so it's not files. Before I was able to transfer a 7.88GB file in less than 10 minutes, recently my last 2 orders took over 30 minutes to transfer the same file. Also, 2 flash drives out of 20 were completely corrupted and all 3 of my computers and laptops didn't recognize the flash drive.