A 4TB solid-state drive (SSD) offers a massive amount of storage space, ideal for handling large files, high-resolution videos, and complex software. However, such high-capacity drives can be costly. SanDisk’s WD_BLACK SN7100 is a compact M.2 2280 SSD that uses PCIe 4.0 connectivity, TLC 3D NAND memory, and a DRAM-less HMB (Host Memory Buffer) design. This 4TB model is now available at Newegg for $559.99, down from $580, using the promo code SSF73634. The drive boasts sequential read speeds of up to 7,000MB/s and write speeds of up to 6,700MB/s, with an endurance rating of 2,400TBW (terabytes written), which indicates how much data can be written to the drive over its lifetime. It also offers 1.35 million IOPS (input/output operations per second), which affects how quickly the drive can handle multiple tasks at once. The drive uses PCIe 4.0 x4 lanes, which allows for faster data transfer compared to older versions, and TLC 3D NAND, a type of flash memory that balances performance and cost. The HMB design uses system memory instead of dedicated DRAM, which can affect performance under heavy workloads. The SN7100 also has a maximum operating power of 4.5W and is 100% more power-efficient than the previous generation, making it suitable for systems that prioritize energy efficiency. Despite the small price reduction from $580 to $559.99, the SSD offers a compelling combination of speed and storage capacity, which is especially valuable given the current high prices of SSDs. For example, the 4TB model was available for $209.99 in 2025, highlighting the significant increase in SSD costs over the years. At Amazon, the drive was once priced at $1,379.99, but is now available for $579, showing a more reasonable but still high price point. The 4TB WD_BLACK SN7100 is well-suited for creative professionals and gamers who need large storage capacity without sacrificing speed. However, users who regularly handle heavy, sustained workloads may want to consider models with dedicated DRAM, as the HMB design may not perform as well under such conditions. Additionally, the drive does not include a heatsink, so users should ensure their system has adequate cooling and space for installation. For those looking for alternatives, comparing reviews of the best and fastest SSDs can help in making an informed decision.