A few questions need answering before we can make a recommendation...
1. How much data do you need to store?
2. How much do you want to spend?
The best option is a portable SSD drive - they're fast, they're amazingly small, and they're....more expensive.
I'm a huge fan of the Samsung T5 drives - and they do have the best reviews (by a hair) of any of the tiny SSD drives. Avoid the T7 - there are some (scattered) reports of it getting a little too hot - plus, unless you have the latest and greatest USB C ports on your computer, you're not going to be able to utilize its higher speed anyway.
https://www.amazon.com/Samsung-T5-Portable-SSD-MU-PA1T0B/dp/B073H552FJBTW - for now, I'd avoid the even tinier NVME-based SSDs as they don't seem to be as reliable (from what I've read, they are very temperature sensitive and tend to throttle when hot. I have one - it's the drive from my now-defunct 2014 iMac - and it lives in an aluminum case for heat dissipation.)
Next best option: 2.5" portable drive. My weapon of choice in that category is the Seagate Backup Plus Slim - they come in various sizes and colours and are generally very reasonable.
And finally - there is the cloud backup option. There are several upsides and several downsides:
1. To get adequate storage you'll likely have to pay a yearly fee. Please note that these are not the same as services such as Dropbox and iCloud, which exist to store and sync your files.
2. To get all your data on the cloud initially will take time - generally upload speeds are far slower than download speeds unless you have fibre internet, in which case it is more likely to be closer to being symmetric (though I don't think I've seen any fibre to the home services that offer actual symmetric speeds) - as will doing any major updates of the data on the drive. However, if you keep it updated regularly, which you should do whether using the cloud or not, it shouldn't be an issue as long as you don't have a cap on your data...in which case it may not be the best solution. (Are data caps still a thing in the US?)
3. Accessible from anywhere - as long as you remember your login details, of course.
https://www.tomsguide.com/best-picks/best-cloud-backuphttps://www.lifewire.com/online-backup-services-reviewed-2624712I use one of my SSDs for my entire Lightroom library (as this wouldn't fit on my iMac's internal drive!) and I have a backup of it - also on an SSD and a HD backup as well. Redundancy is good. HDs are cheap...