QFile::rename overwrites files on usb flash drives without warning

The behavior of QFile::rename is inconsistent when used on a file in USB flash drive and when used on a file in local HDD.

Behavior on local hdd:

• If a file with the new name exists, returns false and nothing will be done

Behavior on usb flash drive:

• If a file with the new name exists, returns true and overwrites the existing file without a warning

Steps to reproduce:

• Run the attached project
• Select a test directory on usb flash drive
• Select a test directory on local hdd
• Click "Run test". (Creates 2 empty sample files on both target directories and attempts to overwrite one with the other using QFile::rename)