You should tell what is your USB key and its format type.
I have try to reproduce the issue without problem. OS: Xubuntu 22.04.1, Thunar v4.16. USB key: 16 GB, exFAT. File copied: 'xubuntu-22.04.1-desktop-amd64.iso' (2.3 GB).
You should tell what is your USB key and its format type.
I have try to reproduce the issue without problem. OS: Xubuntu 22.04.1, Thunar v4.16. USB key: 16 GB, exFAT. File copied: 'xubuntu- 22.04.1- desktop- amd64.iso' (2.3 GB).