So I'm hoping for some advice here, maybe on how to just let go of things once they're lost and accept it. 
Tldr at the end 

This is mostly just rambling, apologies in advance. I basically just have trouble adapting to changes, and losing things is also a change. 
I specifically have fear about losing my digital photo collections, I went to try and back it up and realized I have well over 100gb of photos that will surely never be able to download to my shitty computer and that amount expands every day. I once lost thousands of photos (my dad thought the download folder wasn't important and deleted everything inside) and I spent days just trying to calm down from panicking, the anxiety was only alleviated once those photos were recovered, despite most of them being corrupted and useless. 

I have everything stored in the cloud via Google because my devices simply don't have enough storage for all this, but I don't trust Google or any other company to keep these photos secure for the rest of my life. I would upload to multiple cloud platforms, but 100gb is far too much to transfer. And I can't just get a big computer hard drive and download everything to that because I'm afraid of losing everything in a house fire. 

Personally, I'd like to get a bunch of high storage USB sticks, upload everything to multiple of these sticks and then place them in multiple different buildings. It would be very tedious and expensive to do, but i feel like it's the only way I'd feel secure here. 

So if there was a scenario like a house fire destroying physical copies and local computer copies, and then Google screwing up or doing some capitalist nonsense (like holding the files hostage for a subscription fee) I'd actually break down, I don't think I'd be able to function if I lost all that. I have spent years tediously collecting and sorting photos, a lot of these are long since deleted or will be impossible to find again, they're all extremely personally valuable and I don't think I could cope if I lost them. 

Tldr: I have a shit ton of photos, the thought of losing these (and previous experience losing some) causes me extreme distress/anxiety that idk how to resolve or how I'll cope if I actually do lose them. My devices are shitty storage-wise and I don't trust cloud storage platforms much.