Don't just search Google Images and grab something. Make sure you are using something you paid for, something you shot, or something from the public domain. You run the risk of getting yourself, your department, and the university in trouble. Read more: Copyright, Fair Use.
Some useful websites to check:
Prepare Images Before Uploading to Aurora
If you don't have access to Photoshop, try using the following free software to edit images.
Tips for Saving Space
Each website on Aurora comes with a 2 GB storage limit and a file size limit of 100 MB. If your site has a lot of images or other media, you might find some of the below tips for saving space useful.
Edit Images Before Uploading
If you edit images in Worpdress, it appears as if you’ve done the correct thing of resizing and cropping the image down. However, the WordPress image editor is non-destructive, which means it keeps the original in the Media Library, and then creates a duplicate for the new edited version. Instead, try one of the following software to reduce the image size:
Choose a resolution of 72ppi (pixels per inch). Reduce any images larger than 1200px, except for a full width stretched slideshow use 1500px - 1900px. If the software allows, Save for Web… to compress the image into a JPG. This process can compress a print quality image by as much as 99%.
Export Screen Versions of Office Documents
Programs like Word and Powerpoint have options for saving smaller versions of the original document.
If you have a large number of files that people will commonly want to access together, you can bundle and compress them into a single ZIP file for additional storage saving.
For sites with truly massive storage needs, it may be necessary to keep files on another web server and link to them. When inserting an image or linking to a document, rather then browsing the Media Library, you would just enter the URL of the file on the other server. If you require this setup, contact firstname.lastname@example.org about obtaining an account.