New
#1
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.