1. Take the files and figure out what to do with them so they can be read. This isn't a hard problem.
2. Ask everyone affected to email you the photo or a new photo of the documents. We'll just take it on trust that you do so honestly because there's no way you would've seen this coming.
It's honestly one of the biggest conundrums facing academia.
Year by year, incoming students generally have a higher base level of digital literacy than their instructors, because academic institutions did not prioritize developing those skills 10-20 years ago and the proof is showing in the pandemic pudding.
Many people who are very knowledgable in technology (the SV bubble is rather an exception) are very conservative in terms of it. Don't confuse good programmers with "technology hipsters".
My background includes software dev in and around online education for almost 20y in both industry and academic.
Totally outside bubbles and following groupthink :)
The conservatism from technologists that you speak of.. in part comes from the politics at post secondaries and the resistance towards adopting technology.
There's no shortage of understanding in most institutions of the problems and how to solve them, only the political will, and leadership who cares.