"We couldn't move your data: There might be something wrong, check permissions and try again."(Ugh.)

[B4KR]

I just want my music on my SD Card. My 2000 song playlist. I've done it before. LG G6, running Spotify version 8.3.0.681 armv7 last updated April 6th. SD card has 30GB available from 59.4 total. I'm given the impression that this problem ranges from "annoying but fixable" to "this is really debilitating and I pay for premium and a great SD card to download my music **bleep**." So I'm a member of the latter division of users.
When I do the clean uninstall/file deleting thing and begin to download, it instantly stops it with an error "we couldn't download because there is not space left on this device". When I change storage devices I get the "there may be something wrong,check permissions" which I did.