WD External Hard drive not recognized in my computer

WD External Drives WD Portable Drives
5

Hi, Having the same problems. Could u tell me how  to format, if the computer doesnt recognise the external hard drive ?.   This seems to be quite a popular problem as u search google for an answer. My drive was recognised for about 5 mins this morning but then automatically decided it wasnt recognised anymore then dissapeared. Hope this all makes sense. 

Any help appreciated.