WD my passport external hard drive 4TB not open and hung system

i have WD My passport external hard drive 4TB since i not use it long time, when i open, one time open but continuously hang system and as per now connected i unlocked it then onward computer became hanged and drive can not open.
Disk manager also hanged, if even open drive details not available, also no options.
Please need your help and valuable suggestions.
Thank you