This is my first hotspot and am new to hotspots, Pi-Star and the RPi. After a week of frustration, I finally have the Nextion screen working. (Thanks to KE7FNS

When the screen was out of the case I loaded a .tft file with SD card. In the case now there is no access to the SD card slot. In this configuration I would like to now if there may be some way to upload new .tft files to the Nextion screen without having to remove it from the case? OK, call me lazy!
Is there a way to upload the .tft file to the Nextion screen either via Pi-Star directly or from one of the USB ports on the RPi?
Thanks