True, always have a portable storage device and back up your work regularly.
If all you can get are the low res images that they publicly release at least that’s something, they might not be print res, but you can probably get away with presenting them electronically right?
I don’t know anything about the product/project and how it will be released, however if they release product brochures in electronic format, like a .PDF it is very common that the high res images are imbedded in those kinds of documents. They might be re-scaled during layout like in InDesign, but often they maintain their native res.
So, if you can get your hands on these kinds of documents then open them in Photoshop, you’ll get a dialogue box, click images, and boom they’ll open in their native res. I do this all the time in my job to get client art/photos at higher res, worth a shot.