Dorypal 512GB USB Flash Drive Waterproof Metal Thumb Drive Memory Stick Pen Drive with Keychain

Tried writing a whole load of data onto it and won't hold the data. Tried 3 times now copying over 140Gb worth of data and it doesn't hold onto it.

This device cannot hold data. I moved a few files to the device, checked the files later and they were either missing or corrupt. Told Amazon I wanted to return the device then got an email from the supplier saying I would get a full refund if I changed my review.

USB stick arrived promptly. However, it could be connected to my laptop only once. Some files were downloaded, but then it went dead. Numerous attempts to get the memory stick recognized by several devices failed, and the files could never be accessed again. Useless product, returned for refund.

Received when promised. I had read a lot of reviews of usb's bought online so was concerned it would not work. However it does and I am very happy with it. Happy I bought it and will buy more from this company.

The throughput on this is around 10MB/s both uploads and downloads; this is Megabits not Megabytes, so copying over 120GB is taking over 6 hours (...and still going). I should give it back and ask for a refund, but it's too much hassle

I finally got round to using this and like others noted on the reviews here had issues once I uploaded more than 29Gig worth of files on it. Running tests as others did this is a 32 gig USB packages to be sold as a 512 gig file. Amazon should take these Chinese tat down as it's nothing other than wrong selling them advertised as they are.Buy well know brands like Scandisk to save any issues like we had.

This is Fake drive, Amazon should investigate, the advertised capacity is Fake...

Have tried a few times to put photos onto here for back-up & they disappear when you go back onto it!! I thought it was me being stupid but have had it checked & definitely doesn't hold anything!! Not sure how to contact the supplier as feel a refund is due on this!!!!!