The most popular services to upload and share files :

Alexa rank :

1 - google.com/intl/drive
91 - dropbox.com
195 - mediafire.com
289 - mega.nz
460 - 4shared.com
560 - zippyshare.com
565 - uploaded.net
927 - rapidgator.net
1140 - uptobox.com
1315 - turbobit.net
2413 - 1fichier.com
2736 - sendspace.com
3181 - solidfiles.com
4354 - depositfiles.com
4446 - tusfiles.net
5218 - ziddu.com
5734 - filefactory.com
6230 - uploading.com
8042 - hugefiles.net
8406 - 2shared.com
11108 - prefiles.com
11205 - uppit.com
13410 - 4downfiles.net
14597 - ge.tt
17121 - bitshare.com
17230 - speedyshare.com
20091 - freakshare.com
20485 - filedropper.com
29075 - dl.free.fr
37570 - primeshare.tv
44137 - firedrive.com
46914 - secureupload.eu
48285 - keep2share.cc
61199 - anafile.com
64564 - filemoney.com
72454 - crocko.com
111800 - fileswap.com
149367 - load.to
170644 - upvast.com
202718 - kingfiles.net
213997 - unlimitzone.com
231964 - filehosting.org
375796 - zipshare.com
440047 - 2downloadz.com
599340 - filedropme.com
1050601 - massmirror.com
1853608 - ryushare.cc
2097615 - zipmenow.com
605863 - gigamirror.com
6696611 - nippyzip.com
15775063 - privatefile.com

Multi upload :

60728 - multimirrorupload.com
70686 - multiupfile.com
131813 - uploadmirrors.com
218831 - uploadmagnet.com