Slow Speed Transfer MacBook Pro M1

Rather than playing "20 questions", download and run this little "discovery" Utility, Etrecheck. It fixes NOTHING. Its only reason for being is to create an anonymized (no personally-identifiable information) report that shows what is going on inside your computer.

"Share" the report to the Clipboard, then "Paste" to the "additional text" window in the reply footer. Or use this article:

Using EtreCheck to Troubleshoot Potential… - Apple Community

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The 5G bits/sec number is the speed of the USB Bus, not the speed of the drive. The drive speed will be much lower because rotating magnetic drives like this one are simply not that fast.

did you use the same Disk test in each case?

Please state EXACTLY how you have made the connection from each of your Macs to this drive.

Mention every cable, adapter, and dock and its make&model, if available.

so that top adapter --

is that an Apple USB-C Digital AV Multiport Adapter?

If so, it has two different USB ports with two different shapes and two different capabilities.

and the bottom item. Is that the drive?

What input connector is on the drive, oval USB-C or rectangular USB-A?

Is that your exact cable? that appears to be USB-C to Micro-B.

if so, why are you bothering with the Apple USB-C MultiPort adapter AV?

Apple USB-C MultiPort adapter AV USB-C port is considered a Charge-only port, and is limited to USB-2 speeds, ...

... which would limit the maximum transfer speed of your drive to around 50 G Bytes/sec or thereabouts ...

...wait, isn't that what you are complaining about?

The Apple-Silicon M1 is working as designed.

If your report is correct and that 100 M Bytes/sec WITH the adapter, The MacBook Pro 2019 is malfunctioning.

Apple USB-C MultiPort adapter AV USB-C port is considered a Charge-only port, and is limited to USB-2 speeds, 500 M bits/sec, or very roughly 50 M Bytes/sec for thereabouts.

However, if you connect that USB-C to USB Micro-B cable WITHOUT the adapter, you should see the drive run at its fastest possible speeds in both cases. (likely 100 M Bytes/sec.)

¿why are you even using that MultiPort adapter AV ?

<< Don't focus on the adapter. >>

The adapter is the issue.

it has two ports in addition to the HDMI port.

The data port is the rectangular one. it can support disk drives at USB-3 speeds of up to 5,000 M bits/sec, roundly 500 M Bytes/sec.

The USB-C port ON THAT ADAPTER is a Charge-Only port. Its USB data lines support only USB-2 at best, which is nominal 480 M bits/sec, or about 48 M Bytes/sec. Your test was only slightly higher at around 60 M Bytes/sec.

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Bypass the adapter, and I expect you will get about 100 M Bytes/sec from either computer, which is likely as fast as that drive can run.

MacBook Pro 2019 and every model-year MacBook Pro 16-in have USB-C ports.

Use JUST your USB-C to Micro-B cable, plugged directly into a USB-C port on either computer, and your speeds should be as fast as that drive can produce.

The Apple USB-C Digital AV is not 'just wires'. it is a complex USB Hub that comes with some restrictions for some of its ports. Most of its available bandwidth is consumed in providing an HDMI connection for a display. DON'T plug any USB-C devices in there if you want them to be FAST.

I suggest you re-test with cable alone the MacBook Pro 2019, to confirm that it STILL " gives me 100Mb/s".

Then re-test with cable alone the M1 2022 to confirm that it STILL "gives me 60Mb/s".

Perhaps some other factor is leading to the slowdown, and we can figure out what that could be.

That drive is not APFS format, so it is likely Windows New Technology File System (NTFS).

But your NTFS reader on this Mac is broken.

Its executable can not be found. if you want to keep using that drive in that format at reasonable speeds, your need to at least un-install and re-install iBoysoft NTFS helper.

while you are up, you have part of a VPN that should get completely un-installed.

Clean up:

/Library/LaunchDaemons/com.iBoysoft.ntfshelperd.plist

/Applications/iBoysoft NTFS for Mac.app/Contents/MacOS/ntfsassistantd.app/Contents/MacOS/ntfsassistantd

Executable not found

/Library/LaunchDaemons/com.expressvpn.expressvpnd.plist

/Applications/ExpressVPN.app/Contents/MacOS/expressvpnd

Executable not found