Non embedded audio omf/aaf

When importing an AAF or OMF where the audio isn’t embedded is there anyway to force Nuendo to copy the audio to pool rather than linking. A couple of times I have imported an AAF from a server which Nuendo has just linked the audio and I have forgotten to prepare archive before moving onto another project only to find when i open it later the source AAf has been deleted and my audio gone with it. A mammoth pain in the arse. Would be nice to always force the audio to be copied and not have to remember to prepare archive.