I purchased a T5 portable SSD drive (500MB) awhile back from Amazon but only recently started using it.
From a MacBook Pro, I was copying files to several SSD drives, including a T1 and a WD Passport, and I noticed the T5 was several times slower than the other drives. I downloaded the BlackMagic Disk Speed Test app, and noticed I was getting read and write speeds on this drive that were right around 40 MB/s. Testing the other drives, including the internal SSD, I was getting speeds more in the 200-300 MB/s range. I reformatted the drive using JHFS+ but it made no difference.
I then took the drive to a Windows machine and reformatted it using NTFS. Using AS SSD Benchmark, I am seeing read and write speeds on the drive between 20-25 MB/s. Again, other SSD drives are showing between 200-300 MB/s.
I am thinking that maybe it's the cable. Can I use any USB-C to USB-A cable as a replacement?
I am really disgusted with this since the drive is obviously defective and it is too late to get my money back.
The drive you have may be defective, replacing the cable might be a good idea to see if it makes a difference, however have you contacted Samsung's technical support? These drives typically carry a long warranty and you should be able to start a warranty ticket with them if you try giving them a call.
Same here!!! I upgraded from 500 ssd WD and bought T5 1T. I'm using as external hard drive for my virtual instruments, it took 7minutes to upload one of my VST.. I changed the cable too but it's the same..