I'm hoping for some suggestions from folks who shoot RAW & have to deal with the large file sizes. I've done some research online & haven't really found a great  answer. Please bear in mind that I am not a professional photographer, nor am I independently wealthy - which is my subtle way of saying that I'm looking for a cheap, yet reliable & easy solution. I'm not asking for much, am I?

Before I had RAW capability, I used two 16GB memory cards & each one could hold a little over 3,000 jpgs, which was more than enough. When I got my new camera & started shooting RAW (actually RAW + jpg), I quickly found that wasn't going to be enough, so I bought a reasonably fast 32GB card, which holds about 1,200 RAW + jpg shots. For every day use, that's plenty, but when I travel somewhere scenic, I usually shoot between 200 - 300 photos per day. Which could be over 4,000 on a 2 week trip or over 6,000 for a 3 week trip. I used to lug a laptop around (which would have been a good place to back up my photos), but this past year I got rid of it & now use a tablet, which is much easier to travel with, but has a miniscule amount of storage. So my question is: What's a good strategy for storing up to around 6,000 photos (roughly 160GB) while traveling? I don't like to spend time reviewing & deleting while I'm traveling, so that's not an option for me.

I could buy four more 32GB cards or two 64GB cards or one 128GB card. Cost  would probably be a little over $100. If I do that, any thoughts on which option would be best? Are the larger capacity cards as fast & as reliable? I've never had a memory card go bad on me, but I'm a little concerned that if I get a single 128GB card, I could lose an entire trip's worth of photos.

Another idea I had was to buy a 128GB thumb drive (also known as a jump drive or flash drive). My tablet has a full size USB port & SD slot, so I could use it to transfer from memory card to thumb drive. This is a cheaper solution, as I can get one for about $50, but I'm concerned about it failing. I've read a lot of reviews of them on Amazon & the number of failures reported is disturbing. So, again, I could lose an entire trip's worth of photos & I'm thinking they're probably riskier than memory cards. Does anyone use these for photo backup?

I don't think saving to the cloud is a realistic option because I can't count on having a fast or reliable enough connection while traveling to upload that volume of photos & I'd also have to pay a monthly subscription fee, which I don't want to do.

Thanks in advance to anyone who's had the patience to read this far. Have I overlooked some obvious or not so obvious solution? Any suggestions would be welcome. And Happy Holidays to all!