Prologue: I used my Ubuntu file viewing GUI to move data files around and "clean house" a bit.
I started a new GRASS session and tried to add NED elevation rasters which I have successfully added before. I got the error message "`/home/greg/GRASS/Loc-Oakland/NED_elev_rasters/CopyNED1-9Oaklnd/10959312\10959312\w001001.adf' not recognised as a supported file format."
Since the software recognized it before, why the change? Is it because I moved the files? QGIS gave me the same sort of error message, although I had successfully loaded these files before. Thank you.