If i save a text file .odt and save all it does not include the pictures that in the txt are links to central libary , so the file saved on a stick does not sow them 
how to achieve this ?
You can break the links to embed the pictures.
Menu/Edit/Link
You can break the links to embed the pictures. Menu/Edit/Link
It doesn’t work. When i try do it libreoffice hangs and i can kill only by system-monitor or by terminal. In my ODT file, there are three links to pictures from the Internet. I can open, but can’t save it.