Folders are not copied to a network drive - Wi-Fi, wireless networks, what could be wrong?

Question

Computer networks

I connected a usb hard drive to a ZTE router, when I try to copy a folder from Windows 10 to it, a network error pops up, and if you click the "Retry" button, one of the subfolders is still copied, and the network error message appears again, but for another folder. That is, in this way, you can copy the entire folder (with all subfolders). But if there are a lot of nested folders in a folder, then it is not very convenient to poke the mouse every time. In this case, the files are copied without any messages or problems.

Answer 1

1. Connect the drive to PC, check if it works as it should.
2. Try to download and upload a large amount of data to the Internet. For example, on Yandex disk or one drive.
If both checks were successful, then the problem is obviously in the firmware of the router. Or with a much lesser probability in the USB port of the router. The first one will most likely be cured by flashing (download the latest firmware from offsite and update). The second is treated only by replacement.

Answer 2

1. Pointer to pointer. We create a 2D array as a bunch of dynamic 1D arrays. If a 1D array is a pointer, then an array of such 1D arrays is an array of pointers, that is, a pointer to a pointer.
2. A simple pointer (create a 1D array of pointers that will become the "backbone" of our 2D array).