You don't need to splash for an SSD if it's for back up.
Rather get 2x 2Tb HDD external drives, and nice waterproof cases for them. label one as back up, keep it as a clone drive that you can update every few months
Keep you main drive with you with your computer at home, and keep your clone drive somewhere else, maybe at your office or parents house or in a steel box hidden elsewhere in your house. This will help keep your photos disaster proof
On top of this, in your drive keep a folder where you have a copy of your selects and best bits. If you have Google drive or photos, you can set up the software on your laptop to sync that folder to the cloud. That way the best photos and memories are stored off just your two drives and whatever you drop into that folder gets synced automatically.
I keep my raw photos in folders organised by 'date - occasion', In a master folder. When I go through a folder and make my selects for my album I put the selects in a subfolder called 'date - occasion - processed'. I copy the processed folder and paste it in my cloud folder which I have on my PC, sometimes I delete a few processed images to keep it small. These will go in the cloud. That way I have 2 copies of everything, and 4 copies of my favourites.