As I was cleaning up my Windows 10 temp files, I discovered that in the C:\USERS\your name\Documents\ArcGIS.
In that folder has several folders and I have Package there that has 9.04 GB ! and it has all the names with gibbeish numbers and so on..
How do I clean them up ? What should I do with them ?
Have you tried extracting it to see what's in it? You can use geoprocessing tools or ArcMap/ArcCatalog to extract it to a junk folder before deciding whether to erase the data.
You can prevent this in the future by setting an option in ArcMap/Customize/Sharing to choose where future packages are stored. I give mine a subfolder name of Packages so I know I can erase them once I have sent them to whoever needed them.