If you like Snapdrop, you'll love croc!

I used Snapdrop before they got bought and found it pretty reliable. It sometimes would not transfer and I went exploring.

I used magic-wormhole-based Warp and liked it, but now I use croc of getcroc.com for almost everything. Whether it's sending files to myself or others, it's just the most flexible and seems to be reliable and fast from my use.

(I haven't been using it super long, but I heartily recommend.)