Hmm, I've just pulled my tablet out (my phone hasn't got an SD card slot) and X-Plore just shows me the SD card. Maybe scroll to the top and tap on the word "internal storage" to collapse the display of your internal folders. You should then see the SD card. Or scroll right to the bottom and it should be there. It's easy to move files with X-Plore: set the tab on one side viewing the files you want to move, the other viewing the destination you want to move them to, and then select the files you want to move and press either the "move" or "copy" tool icon - it will ask you to confirm, and you can see where it is going to move them to.
And when I installed Solid Explorer on my tablet it opened the first time with 2 windows, one viewing the internal and one the SD (this is what it does in portrait mode on a phone). If you touch the "hamburger" menu icon (3 solid bars) on the left the slide-out menu should have a section at the top labelled "Storages", where you can see both internal and SD. Tap on SD, then you can navigate through the folders on that.
(Off-topic, but the reason I find videos a hassle is that I can read 10 times faster than people speak or show things on a video, I don't have to fiddle if I want to go back and look at things again, and I don't disturb people around me or have to find headphones if I want to hear what is being said. It's a personal thing, but I just find them less convenient than text in almost every way, and hence usually just ignore them when I see them posted, and almost always ignore threads which start with a video and no description of the problem.)