A trap/gotcha to be aware of 😲
Now that the upload file size limit is 100MB per file be careful if you accidentally start uploading a 30MB file, for example, when you intended to upload a 1MB version.
I just found out that when I cancelled/deleted the uploading of a 3.5MB file during the upload (the percent uploaded display is still increasing), the 3.5MB was still added to my Used Space and deducted from my Free Space values.
The take-away lesson is that if you accidentally start uploading a larger than intended file, let the upload finish and then delete the completely uploaded file.
Deleting a completely uploaded file will deduct its file size from your Used Space tally and add it to your Free Space allowance.