Cannot find twrp backup file

I recently rooted my G3. Step two was to download a recovery and make a backup. Recovery downloaded fine. Started making my backup and everything seemed to work. It said it successfully made the backup, but I can't find the nandroid file anywhere. I've read some other threads about where they are typically located, and forgive me if I'm overlooking one here on XDA, but my backup isn't in any of the locations those threads suggest. There is no folder that I can find named TWRP. I've looked in media, backups, storage, mnt, nothing. This is looking from both The file explorer within the TWRP Manager app, and ES File Explorer. The most I can find are these three files with question mark icons called "TWRP", "oldrecovey", and "newrecovery" (see screenshot, files are at bottom left). Nothing there though under the file name I saw when I created the backup....which was the date, and then a few more numbers, and then I added the word "stock" to the end.
I did notice a prompt when I opened TWRP the first time that said I didn't have busybox installed and would I like to install it. I clicked on to install it but it didn't seem like anything happened. Could that be the issue?
I'm sure it's something simple but I'm new to all this.

Thanks!

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