Windows 10: External SSDs not suitable for large file transfers?

I recently returned a PNY Elite portable SSD ( PNY Portable SSD Elite Silver USB 3.1 (480GB): Amazon.co.uk: Computers & Accessories ) because the transfer rate fell a lot after about 60 seconds. I was writing 32GB and 62GB image files from internal SSD to it and the transfer rate (via USB 3.0 SATA) maintained about 350MB/s for the first 60 seconds but then fell dramatically to about 24MB/s. Writing to my other (Samsung M3) external HDD maintained 100MB/s throughout and I was expecting the PNY SSD to maintain 350MB/s throughout. See pictures. I suppose if I was writing only 5GB and it took less than 60 seconds then I would not have the problem but the reason I want the SSD is to write images up to 80GB to it.

Question - Do all external SSDs suffer this dramatic fall in transfer rates after 60 seconds or have I been unlucky in buying the PNY? If so then SSDs are worse than external HDDs for large file storage.

:)

 

Transfering to an External...

Very true and I do like it to be portable. I have a large number of movies and music and things of that nature on there so it comes in real handy when I want to go to a friends house or something of that nature. I'm not complaining about the transfer speed whatsoever because most of the time I end up waiting a few minutes for larger files and while transferring I simply do something else.

 

File transfers slowing down, W10

i'm watching these files transfer from an SSD to a mechanical, and seeing speeds vary from 15MB/s to 80MB/s.

Windows reports the drive is at 100%, but i'd love to know what metric it's using to determine that, especially since its transferring large files (~500MB average)

 

Windows 10 large network file transfer hangs OS

Hi,

The challenge that you are experiencing when you're doing a large network file transfer can occur due to several reasons, such as, configuration issues, hardware limitations, etc. To better assist you, kindly answer the following questions:

• Are doing a wired or a wireless transfer?
• Were you using other programs while you were performing the large network file transfer?

We look forward to your response.