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Fedora 28 system freeze while copying large file

tl;dr Attempt to copy a large file from an external HDD to a location in my /home partition results in a system freeze. The system freezes not long after the amount written to disk begins to exceed the 8GB physical RAM on this machine, but it's a different amount each time (between 7.7 and ~15GB).

Using Nautilus to drag-and-drop the system hangs immediately. Opening a Terminal window and using cp, it takes longer, but it will eventually hang.

What is going on? And how do I gain the ability to move large files onto and off of my /home partition?

Here are some possibly relevant details.

OS: Fedora 28 (kernel 4.17.6-200.fc28.x86_64)

System details: This is a laptop with Windows 10 on the primary SSD. F28 has a second SSD all to itself using Fedora's default partition setup (ext4 with separate partitions for /, 50GB, and /home, 400+GB). Not sure it matters, but the SSD is sitting on a m.2 pcie 3x4 interface.

The system is running an Intel core i5-8250 CPU with 8 GB RAM.

Involved hardware: Peripheral HDD formatted NTFS

Fedora 28 system freeze while copying large file

tl;dr Attempt to copy a large file from an external HDD to a location in my /home partition results in a system freeze. The system freezes not long after the amount written to disk begins to exceed the 8GB physical RAM on this machine, but it's a different amount each time (between 7.7 and ~15GB).

Using Nautilus to drag-and-drop the system hangs immediately. Opening a Terminal window and using cp, it takes longer, but it will eventually hang.

What is going on? And how do I gain the ability to move large files onto and off of my /home partition?

Here are some possibly relevant details.

OS: Fedora 28 (kernel 4.17.6-200.fc28.x86_64)

System details: This is a laptop with Windows 10 on the primary SSD. F28 has a second SSD all to itself using Fedora's default partition setup (ext4 (LVM, the home directory is 400+ gb with separate partitions for /, 50GB, and /home, 400+GB). 350+ gb free). Not sure it matters, but the SSD is sitting on a m.2 pcie 3x4 interface.NVME (pcie 3x4).

The system is running an Intel core i5-8250 CPU with 8 GB RAM.

Involved hardware: Peripheral I am trying to copy from an external HDD formatted NTFSNTFS. This whole situation is a little boggling to me because I managed to get the files ON to the HDD from another, older laptop running F27.