What’s your fool-proof/ low tech IQ way of storing photos and videos?

I have an iPhone for work and a personal iPhone. WORK- I had to delete 4G of photos and videos to make space for system update; which didn’t work so I am visiting an Apple store for help today/ tomorrow. Right now those 4G worth of photos are saved on my work laptop. Since I deleted them from my phone I guess they are not on my iCloud?

PERSONAL- I upgraded fro.m 5GBto 50GB of iCloud storage so I could finally back up my phone in like 42 weeks. I’m now using 26GB.

1) can I transfer my photos saved on my work laptop to my personal iCloud?

2) is there a safer place to keep all of the photos and videos?