Capacidad erronea en Cloud

before contacting adobe, 

disable the photoshop presets feature as described here (chose NO when asked to keep the data in the cloud): https://helpx.adobe.com/ie/photoshop/using/sync-presets.html

then go to your cc web site by opening cc desktop app>clicking cloud icon>cc web empty all 8 folders (4 in your files, 2 in shared with you, 1 in shared with you, 1 in deleted).

note: if you delete from your sync folder, your local files will be deleted, too. this is the only folder that affects your locally stored files.

click the lightroom link at bottom left of your cc web page and delete files from there.

lastly, recheck your deleted folder and delete whatever is there.

if you can't account for the 17gb after doing that, contact adobe support per @John T Smith 

Be sure to remain signed in with your Adobe ID before accessing the link below
Do be aware that Adobe's staffing is impacted by the virus, so wait times are long
-you MUST make sure that your browser does NOT block ads, scripts, or pop-ups
-you MUST also allow 'cookies' in your web browser for the link to work
This link will go directly to the chat option
Type "Agent" in the chat box to bypass the chatbot and be connected to a person
-Meaning type in the word Agent without the quote " " marks
https://helpx.adobe.com/contact.html?rghtup=autoOpen
- or by telephone https://helpx.adobe.com/contact/phone.html
.
Adobe does NOT do support by email, so beware of answering anyone who sends you a private message
-click for more information about scammers https://tinyurl.com/10791730