Recursos
From LimeSurvey Manual
Introducción
Aquí puede administrar archivos (imágenes, archivos multimedia) que se cargaron en el Editor HTML. Puedes acceder a él yendo al menú de encuesta de tu encuesta y buscando la pestaña Recursos:

Recursos
Una vez accedida, se mostrará la siguiente página:

From this panel, you can:
- Browse the available files from your installation;
- Export files as a ZIP archive;
- Import a ZIP archive of files.
Tips & Hints
The following tips & hints were written by our community members. Feel free to add more:
- Authorized files extensions are defined by settings in config.php files.
- The pictures and media files that have been uploaded via the HTML editor are stored in the "upload/surveys/<sid>" subdirectory, where sid is the survey id.
- The uploaded files from survey X will only be seen while browsing the resources of survey X (groups, questions, answers). They cannot be seen from any other survey or objects (labels). However, do not expect this limited visibility to ensure confidentiality of the resources as they are reachable with a simple browser to anyone who knows the URL to the respective file.
- You can't import a ZIP file containing subdirectories.