If you only need to retrieve files (to what media?), you could get by with very low color depth.

A 17' display required a slower refresh rate and a reduction in color depth, because of the 1 MB of DRAM for video support. This is only 75% of what a Performa 6200 shipped with, and that was for support of a 15' multi-sync display. The stock amount is 512K, but a 256K SIMM bumps it to its max at 768K. An additional problem concerns the very limited amount of VRAM in an LC III. Using this adapter, you can receive an output from your super-powered Mac Pro on your VGA monitor, projector, or TV. The changes can't be made on the fly, with the computer turned ON.

After all, is connected, power ON the projector. Connect the wider end of the adapter to the VGA or HDMI cable of the projector. Insert the smaller end of the MacBook adapter into the thunderbolt or mini display port. Otherwise, it would be trial and error - changing the settings, powering ON the computer, and if no video were present, powering OFF the computer and trying a new setting. Plug the projector into a wall outlet and leave it powered OFF for now. Belkin included a sheet with various settings for a number of display types/sizes. USB-C to VGA Adapter, Bincolo USB 3.1 Type C (Thunderbolt 3) to VGA Converter Compatible with MacBook Pro, New MacBook, MacBook Air 2018, Dell XPS 13/15, Surface Book 2 and More.

You could try a Mac-to-VGA adapter having a set of 10 DIP switches or one of Belkin's older/similar adapters that also included a rotary knob, but only for use with a CRT display having a 4:3 aspect ratio.

Connect a mac to a mac vga adapter