Ran Disk Warrior and it fixed the problem (turned out to be a problem with the directory.I purchased/ downloaded Disk Warrior (cost like $130- expensive but my data was important to me and prob less $ than a recovery service).Did research on Reddit and saw that Disk Warrior was highly regarded.WD tech suggested I find a data recovery service or software. Drive showed up in Disk Utility but could not be mounted or repaired by Disk Utility.