As Teggy wrote, the temporary working location is just a path. As I saw , the 7 MB is just a default shown by the Management hub. Windows explorer will show the available space on the drive where the path points to.
Missing working space is only the most common cause for a 9286 response code. Another possible problem can arise if you use document names. These have to be unique, but AFAIK this info is in the README.
In short, if a user is mass loading documents with document names, he should better be sure that the document names are unique, because a violation of this rule will be detected very late and just lead to a response 9286.
HTH,
Hermann
#webMethods#Tamino#API-Management