MS 14,13 Copying to large usb-c stick gives error on stick

[Jefke Peeters]

A few months ago, my wife received a Go Pro 11. Made some recordings on it during our holiday and this takes about 46GB's.
On the MS, There's a Trebleet dock connected with 2 nvme ssd's. One of them is used for storage, so I copied the 46GB from the SD card of the GoPro to the nvme in the Trebleet.
I did such things in the past without any problem.

I needed this files on another place. I own a very fast 256USB-C stick, connected this on my MS (or on the Trebleet dock gives the same result), and tried to copy the 46GB to this USB stick.
The file transfer starts really quick, but slows down and at around 40% it stops with the error "not possible to copy, because the device disappeared".
The same error with another USB-C drive.

I tried the same on my 2017 15" MBP i7. This gives no errors.

MS is on Sonoma 14.6.
What could be the issue?

 

[Fishrrman]

Are you using a hub?
If so, connect the "target" USB flashdrive directly to the Mac.

Trying to copy a single file that is 46gb in size might invite problems.
At least it seems that way to me.

Is this some kind of video file?
If so, I'd use a video app (iMovie, Final Cut Pro) to convert it into a more "compressed" format, or perhaps even "divide it into smaller pieces" (say, about 10gb each).
Again, trying to move a file nearly 50gb in size, is looking for trouble.

 

[Jefke Peeters]

maybe I wasn't completely clear... It's a folder what contains several video files. Totally 46GB.
the largest video file is 8,5GB

 

[Fishrrman]

Could one of the files have become corrupted in some way?
This would interfere with the copying.

Suggestion:
Create a NEW empty folder on the USB flashdrive. Give it whatever name you wish.
Now, try copying the files one-at-a-time from your source to the new folder on the USB flashdrive.
Does this make a difference?

 

[Jefke Peeters]

Your suggestion did the trick. One file, perfect playable did this annoying behavior. I could find out which one by doing your trick.
I was cheated because the same files copied well on my Macbook.
I find this still a crazy thing why this doesn't give issues...

 

[Fishrrman]

"One file, perfect playable did this annoying behavior."

If that file still won't copy, what I'd try is:
1. Open it using iMovie (maybe even Quicktime Player will work?)
2. "Re-save" it (as if it were a new file) to the drive.
3. NOW try copying the "re-constituted" file to your USB drive.

No promises...

 

[Jefke Peeters]

Yeah indeed, I did something similar. Opened it in Wondershare uniconverter, let him render this and saved it. 1:1 the same file, but I can copy this.
Strange, but solved...

Thanks for your help. I have to stop thinking why it works on the Macbook and not on the MacStudio I believe 🤓
One Mac problem remaining, but it's something on my Macbook. I'll post it in the right subforum.