virtualbox.org

Dear all,
I am a user of Virtualbox. I installed Virtualbox on my windows machine and installed Ubuntu in virtual machine. I do research and using Matlab on Ubuntu. I need process data and stored it back to Window machine in .mat files. If the .mat file is smaller than 2 Gb, it should be okay. But if it is larger than 2Gb, all values in mat files are zeros. I try to identify the problem by storing mat file in Ubuntu machine and everything is fine. So, the problem is writing a mat files more than 2Gb into shared folders.
Hope to receive your answer soon.

Are these GA shared folders? If yes then try a true network share.

GA shared folders are a convenient way to copy moderate sized files to and from the VM, but for anything more strenuous a true share is probably better.

These are shared folders. Thanks.
What is true shared network?
P/S: I am not sure what is GA in your post.

GAs = Guest Additions. See user manual.

GA Shared Folders = simple (non network) shared folders implemented by the GAs.

True Shared Folder = network shared folder created in the standard way, not implemented by GAs.