I'm using Contact Form 7 version 3.1.2, and I can't seem to get file uploads larger than 2MB working. Everything up to approximately 2MB works flawlessly. Anything larger than 2MB will cause the rotating arrow issue. My setting is:
<p>File attachment (jpg, jpeg, png, gif, pdf, doc, docx, ppt, pptx)
[file file-741 limit:2mb] </p>
1) Changing the limit makes no difference (I tried 20mb, 10mb, 4mb etc). The only advantage of the limit is that the user receives an error message.
2) If I create 2 (or more) upload forms, it will use the sum total of all the attachments, not each attachment size individually.