My fasta data are now integrated and available, <br>If you encounter the problem, follow the wiki link :  <a href="https://bitbucket.org/galaxy/galaxy-central/wiki/DataLibraries/UploadingFiles" target="_blank">https://bitbucket.org/galaxy/galaxy-central/wiki/DataLibraries/UploadingFiles</a><br>
<br>I specify the location path of my data source in the  universe_wsgi.ini file : as<br><br>library_import_dir = /my/data/location<br><br>and then import my data using the admin UI.<br><br>Thanks for your answer Jennifer, <br>
best regards,<br>Ben<br>