I've bought a used Crucial MX500 250GB for 30€ in 2019.

Last week I got a Crucial MX500 1TB for 45€.

I can get a 2TB for below double-price but I only need 1 TB and I read that it has a different build with lower speed (lower TLC, smaller DRAM or something, I don't know).

Exactly 4 years and certainly not barely moved.

How do you organize 18,500 images on a hard drive?

Folder name: YYYY.MM.DD [Event Name] AB

The main copy is in my main external SSD. 1 copy backup in the backup external HDD, 1 Zipped backup in OneDrive.

Due to slow internet back then and in the case of the FAT32 system, I split every folder to 3,XX GB. So the "AB" is 01 02 03 for a large event. Like my wedding with >200 GB of photos and videos.