Gvfs fails to copy file over 4 GB

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1

Hello, I am experiencing a problem with copying large file sizes from my galaxy s21 to a fuse-zip mount point (Bitbucket). I have a zip file which I mounted with a empty folder in user space which gives me access to all the files in read-write. I connected my galaxy s21 with usb, then copied a file that is 16 GB into the fuse-zip folder, and when reaching 4 GB limit, the copy operation failed. Please see the following screenshots below:

The file is 16.3 GB (16,288,472,843 bytes) and is located within the DCIM/Camera folder on the galaxy s21

In the below 2 screenshots, I am copying the file above from my galaxy s21 to a fuse-zip folder using cp command which resulted in an error

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Using rsync also failed after nearing completion when copying to local folder. It retries to copy again, fails again

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My question is, why does gvfs or gnome vfs have a file size transfer limit of 4 GB ? is there a way to use 64-bit copy operations ? What can I do ?

2

It seems 64-bit file access is a Android extension of MTP. gvfs mtp backend explicitly checks whenever it supports android extensions before failing on accessing files higher than the vanilla MTP limit. I wonder if it fails to detect as an android device for GVFS. libmtp uses a different way to detect support for reading above 4 GB, maybe GVFS could adopt that.

(Just a guess, I have never contributed to gvfs or looked into mtp before. I assuming it is MTP because it looks like you are copying from your android device via MTP and it was an reading error not writing.)

4

I am not very familiar with MTP or not or gvfs, but I have several sources on discord linux servers and also the author of fuse-zip also hinting that gvfs could be the culprit of this 4 GB limit. He suggests that rsync has a bug, and let alone even cp and gvfs has a bug. How come gvfs can’t copy files over 4 GB ?

Also, I mounted my galaxy s21 with a webdav server pro app from the olive tree (https://play.google.com/store/apps/details?id=com.theolivetree.webdavserverpro) and then connected my phone in ubuntu as webdav connection, copying the same 16 GB file from webdav android to fuse-zip results in the same fail copy operation. So it seems that there is a problem with gvfs for large >4GB files.

How do I use libmtp in a similar fashion as copying large files from android MTP to fuse-zip ?

And yes, I am using MTP android (basically simple connecting my galaxy 21 to a USB 2.0 port on the back panel of my PC)

What’s even more bizarre is that when I copy a 5 GiB file from local folder into fuse-zip mounted folder, then there is no error, I even tested with a 16 GB test file and copied it into a fuse-zip folder, it copied without error…so again…the problem narrows down to GVFS

*if anyone has a large file greater than 4GiB can you also test this to make sure I’m not the only one having this issue ?

so then how do I get over 4 GB limit?