Start by losslessly optimizing your images. Using FileOptimizer I was able to reduce https://www.newspaceco.com/wp-content/uploads/2018/08/Logo_final_blanco_sin_fondo.png from 101,266 bytes to 41,984 bytes.
I'm at 417 MB. Yes, I have 2 public galleries but most of space is used for Results images on the News page. I had to backup last night to update WP to 5.6 and had to manually do it via FTP as no room for .tar.gz file.
I use the Site Manger in FileZilla. Attached is a screenshot of those settings. The log is below:
Status: Resolving address of x##.x10hosting.com
Status: Connecting to 198.91.##.##:21...
Status: Connection established, waiting for welcome message...
Status: Initializing TLS...
Upload the file using the File Manager or FTP and then Extract it using File Manager. You can also try changing the upload_max_filesize in PHP options section of DirectAdmin.
moarinfosplz.x10host.com resolves to 198.91.81.6 which has a PTR record of xo5.x10hosting.com (and resolves back to 198.91.81.6). When you access DirectAdmin (cPanel), does it show xo5.x10hosting.com:2222 in the address bar or a different URL?
This worked for me:
<FilesMatch "(\.gz)$">
ForceType text/xml
</FilesMatch>
See https://www.kolbys.net/gz/note.xml.gz
Got this from https://stackoverflow.com/questions/15202986/why-chrome-prompts-for-downloading-a-page-as-a-gz-file-on-hyperlinks-but-not-i
In the File Manger, if you place your cursor over a folder (in the right column), select "Compress and download...". You backup your database by exporting it using phpMyAdmin.