The number of vendors delivering portable, bus-powered hard drives is limited: only Seagate, Western Digital, and Toshiba serve this market.
Both of them adopt SMR platters (similar to the Backup Plus models being sold since late 2016), and given the performance impact of SMR, today we'll be taking a detailed look at how SMR in bus-powered hard drives behaves for consumer workloads. Earlier this year, Seagate announced an update to their massive 5TB Backup Plus Portable, while also introducing a new svelte 2TB Backup Plus Slim external hard drive. This market segment has been stuck at the 4TB mainstream capacity point for a few years now, with the z-height of the models coming in at well over 15mm. HDD vendors have typically used their 2.5" drives for bus-powered high-capacity models.
Hard drives continue to remain the storage media of choice for cost-conscious consumers with bulk storage requirements.
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