All new Seagate internal drives come with 1year warranty. External drives come with 3 years warranty but crash a lot and not something to be used for backup.
All new WD internal drives come with 2 year warranty and 5 year for WD Black. WD has stopped giving Door to door delivery(shifted to AFL courier from BlueDart so now they suck) and customer care will not respond to your call at all. No reply to emails, no reply to calls and no pick up. 50percent of their RMAed replacement drives crash in the first 6 months with no fault of the user. External drives come with 3 years warranty.
Kindly shift to SSD's for data reliability. Now it makes even more sense to get an SSD as it's WAY faster and WAY more reliable.