This question is in reference to Atlassian Documentation: Moving an Attachment
Since it is not described:
To move attachments to a different space use spacename:pagename
It is a pity that this simple options are not included already. Maybe 32k$/year is too less? Maybe we have to wait for the next license-raise to have such simple options.
When I have a page with 32 attachments/pictures I have to move every. single. one. independently.
Such a pity :'(