Sorry for the late reply. I'm not sure whether it's still useful, but here goes.
Your choice depends mostly on what you use your Laptop for: just for travelling or (like me) as a 'desktop replacement'.
It's been a couple of years since I went shopping for a new Laptop and initially, I was a bit surprised by your question. But you're absolutely right. I took a look at my 'goto' Dutch (but english-language) website
https://www.coolblue.nl/en/laptops and I was amazed to see how many mid-range laptops
only had 256 SSD storage! Luckily there are still many that have dual drives: 128 (or 256) GB SSD + 1TB hard-drive. It looks like the Laptops that
only have hard drives are in the minority, and for good reasons.
SSDs are faster and probably more reliable that traditional hard drives because they have no moving parts. The main benefits of a Laptop with a SSD are that 1) it starts up faster (<10 seconds) and 2) both Windows and your apps run faster.
I have no specialist knowledge but it seems Laptop storage options are at a bit of a crossroads between SSDs and hard drives. Most Laptop SSD options are still 128 GB or 256 GB. There are 512 GB SSDs available but they're relatively very expensive. So 256 GB is probably the best option at the moment. This would give you plenty of space for Windows and apps and 100-150 GB of storage for user data. Options for expanding the space for user data fall, I think into 3 categories:
- use cloud storage
- use an external hard drive (cheap) or SSD (Expensive)
- buy a Laptop that has 2 drives (1 SSD and 1 hard-drive)
I have a 2 year-old Laptop with 128 GB SSD and a lot of programs for Word processing, photo and video editing, audio editing, etc. My Laptop also has a 1TB hard drive. Now and again the SSD gets full and I remove any programs that I don't use a lot (and can download if and when I need to) or move them to the hard drive. There's not really any space left on the SSD for user data (documents, photos, videos). So I store all my user data on the hard drive.
You don't mention any other criteria but they may be related. In smaller (thinner) Laptops, there's often only space for 1 drive. Larger ones may offer you the 'hybrid' option.
There are a huge number of websites that offer selection criteria for buying Laptops but FWIW, I think this one (googled) covers most of the bases:
https://www.laptopmag.com/articles/laptop-buying-guide. If you google and browse some 'Best (mid-range) Laptop' reviews you'll eventually see the same brands and even models appearing multiple times. This should give you at least some confidence in selecting a reliable brand.
My feeling is that you don't yet need to choose but have some relevant questions to ask sales people in reliable stores. I say this because many electronics stores compete with internet shopping just by reducing costs (and expertise). Specialist computer stores might be slightly more expensive but are often much better equipped to discuss your needs and offer you personal advice on Laptops that meet these. They continue to exist through their personal service (repeat shopping, word of mouth).
Good Luck!