OYEN Digital doesnt make any HD
There are only 4 conventional HD makers on earth, WD , Seagate, Toshiba, and Hitachi (WD aquired Hitachi little bit ago).
For all information about archives, backups etc etc. see here:
Methodology to protect your data. Backups vs. Archives. Long-term data protection
Toshiba 3.5" HD are made by Hitachi, though marked Toshiba.
Toshiba 2.5" HD Toshiba drives.
There is no "best" for Time machine, only the best mfg. HD. However they all CAN and WILL fail
If you think you data is safe on a SINGLE external HD, your making a gigantic error most people make,
and its a tragedy that can and will strink without fail.
Always presume correctly that your data is priceless and takes a very long time to create and often is irreplaceable. Always presume accurately that hard drives are extremely cheap, and you have no excuse not to have multiple redundant copies of your data copied on hard drives and stored away several places, lockboxes, safes, fireboxes, offsite and otherwise.
Hard drives aren't prone to failure…hard drives are guaranteed to fail (the very same is true of SSD). Hard drives dont die when aged, hard drives die at any age, and peak in death when young and slowly increase in risk as they age.
Never practice at any time for any reason the false premise and unreal sense of security in thinking your data is safe on any single external hard drive. This is never the case and has proven to be the single most common horrible tragedy of data loss that exists.
Many hundreds of millions of hours of work and data are lost each year due to this single common false security. This is an unnatural disaster that can be avoided by making all data redundant and then redundant again. If you let a $60 additional redundant hard drive and 3 hours of copying stand between you and years of work, then you've made a fundamental mistake countless thousands of people each year have come to regret.
Countless people think they're safe and doing well having a single external backup of their vital data they worked months, years, and sometimes decades on. Nothing could be further from the truth. Never let yourself be in situation of having a single external copy of your precious data at any time.