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04/13/2024 01:45:37 AM · #1 |
I cannot understand it. I have WD Passport external drive supporting USB 3.2 Gen 1 and USB 3.2 Gen 2 port on the PC, when I transfer files from PC to Passport I cannot get higher speeds than 90 Mbps, why? Any ideas?
Message edited by author 2024-04-13 01:45:57. |
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04/13/2024 08:20:01 AM · #2 |
What comes to mind immediately is "not all cables are created equal", so be sure the one you're using is designed for high-speed data transfer.
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04/13/2024 10:12:06 AM · #3 |
Originally posted by Bear_Music on 2024-04-13 said::
What comes to mind immediately is "not all cables are created equal", so be sure the one you're using is designed for high-speed data transfer.
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exactly what I was going to say. I had no idea that I was using a slow cable or there was such a thing as a fast cable. makes a huge huge difference. |
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04/13/2024 11:32:15 AM · #4 |
Thanks but I am using the cable that came with WD Passport.
I just discovered that my new Samsung NVMe transfers at 45 Mbps when connected to USB 3.2 Type C but gets to 350 Mbps on USB 3.2 Type A so I started to wonder about the differences between ports. Maybe that's the problem? |
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04/13/2024 11:51:51 AM · #5 |
| Are you really only getting 90 Mbps (megabits per second) or are you seeing 90 MBps (megabytes per second)? My other question is, is the Passport drive an SSD or a rotating drive? |
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04/13/2024 12:27:41 PM · #6 |
I agree there is some bottleneck and the cable is the most likely variable. Are all the ports connected to the same bus? Maybe a hub is slowing it down from the theoretical max. Perhaps they are not all getting the date transferred through the same path.
Message edited by author 2024-04-13 12:28:19. |
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04/13/2024 12:29:51 PM · #7 |
Passport is a rotating drive. Apart from transfer speed I can see the time it takes and they are synched, I mean slow transfer takes longer. For reference, I was transferring the same files each time for comparison.
Samsung is an SSD on a chip so I think there is something happening with the ports but I don't know if it is something I can fix or they are simply different. |
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04/13/2024 12:32:44 PM · #8 |
Originally posted by Yo_Spiff:
I agree there is some bottleneck and the cable is the most likely variable. Are all the ports connected to the same bus? Maybe a hub is slowing it down from the theoretical max. Perhaps they are not all getting the date transferred through the same path. |
I am not using a hub, in all cases they are connected directly using supplied cables but to different ports.
PS I will have to check drivers on buses. |
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04/13/2024 04:50:34 PM · #9 |
If the Passport is a rotating drive, then a speed of 90 MB/s (megabytes per second) makes sense. You are not going to write much faster than that to a rotating drive.
Read/write speeds to/from an SSD are highly dependent on the characteristics of the device. |
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04/14/2024 03:04:36 AM · #10 |
| Thanks everyone. I was wrong assuming that the port speed equals transfer speed, I found a PC Mag benchmark for WD Passport that I have and it is indeed max 110 Mbps. For Samsung SSD the benchmark is close to what I was getting regardless of the theoretical port speed (Gen 1 or 2), the only improvement is for large files (like video that I have a lot now) after reformatting the drive from exFAT to NTFS. I can get now up to 750 Mbps for large files but less for small. |
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