[xwiki-users] Upload files on MyXwiki: tyhere are max size limits?

I'll tried to upload a number of files with these results: 1 - file type .jpg, size 2 MB --> ok 2 - file type .mp3, size 11 MB --> ko (?) 2a - when I used the button "attach" (at the bottom of the page, in the attachments folder) I received no info but no attachments had been loaded 2b - when I used the "Link" command in Edit mode I received an "error" message but the file had been correctly attached (and is still there and correctly downloadable) 3 - file type .mp3, size 70MB --> ko (+ crash?) I tried to upload a extra-large file in Edit mode. Everything appear to be all right but after 6 minutes (equivalent to 15-18MB of upload @ 0.5Mb/s) sharply the traffic on LAN was stopped but the upload popup continue to be active and "busy". No errors info at all. After 2 hours I closed the popup and correctly continue to edit the page. I saved. No attachments found. Questions. There are limits on file size? There are limits on total files amount? It's possible to state the limits on the popup (just to remember limits)? Many thanks Giuseppe Fortini