You can attach files to Analysis.
Top-right corner of the page has an orange Attach files panel-button
. Click it to open the input panel and then you can upload files to Analysis.
Click icon 
to select the file and then click the button Click to upload file and select the file.
Give (or select from dropdown) the version name to the file and select if file shall be duplicated to the newer Analysis later on. See detailed logic about attaching files in: Attaching files
Click Upload to get file uploaded.
After file has been uploaded, you will see it in the list of files.
Open the file by clicking the file-icon 
.
Delete the file by clicking the trashcan-icon 
.