--- product_id: 743131510 title: "Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5\" 7mm (0.28\") Internal Solid State Drive (SP004TBSS3A55S25)" brand: "sp silicon power" price: "£451.05" currency: GBP in_stock: true category: "Sp Silicon Power" url: https://www.desertcart.co.uk/products/743131510-silicon-power-4tb-ssd-3d-nand-a55-slc-cache-performance store_origin: GB region: United Kingdom --- # 3D NAND flash for lightning-fast transfers 4TB massive storage capacity Slim 7mm profile fits ultra-thin laptops Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5" 7mm (0.28") Internal Solid State Drive (SP004TBSS3A55S25) **Brand:** sp silicon power **Price:** £451.05 **Availability:** ✅ In Stock ## Summary > 🚀 Upgrade your laptop’s heartbeat with Silicon Power’s 4TB speedster! ## Quick Answers - **What is this?** Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5" 7mm (0.28") Internal Solid State Drive (SP004TBSS3A55S25) by sp silicon power - **How much does it cost?** £451.05 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/743131510-silicon-power-4tb-ssd-3d-nand-a55-slc-cache-performance) ## Best For - sp silicon power enthusiasts ## Why This Product - Trusted sp silicon power brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **SATA III Interface:** Reliable and widely compatible SATA 6Gb/s interface for seamless integration. - • **Massive 4TB Storage:** Store your entire digital universe without compromise. - • **Blazing 3D NAND Speed:** Experience ultra-fast data transfers that turbocharge your workflow. - • **Sleek 7mm Slim Design:** Perfectly engineered for ultrabooks and sleek laptops—power meets portability. - • **Advanced SLC Cache Boost:** Enhanced caching tech delivers smoother multitasking and longer SSD lifespan. ## Overview The Silicon Power 4TB A55 SSD leverages cutting-edge 3D NAND flash and advanced SLC cache technology to deliver superior transfer speeds and enhanced durability. Its ultra-slim 7mm form factor is designed for ultrabooks and thin laptops, while the SATA III interface ensures broad compatibility and reliable performance. ## Description Fast transfer and quick startup. With a high quality controller and original syncing NAND flash memory, the A55 delivers incredibly fast transfers. Allows for quick boots, fast application loading and quick file processing. SLC Cache Technology for improved performance and longer life In particular, the A55 utilizes "SLC Cache Technology" which allows you to write all the data to the SLC portion first, leading to the highest writing performance. Additionally, this technology reduces light amplification and increases SSD durability and extends service life. Free download SSD Health Status Monitoring Tool - SP (Silicon Power) Toolbox Software The A55 comes with a free download SSD Health Status Monitoring Tool. -SP Toolbox Software is specifically designed to allow you to see the current health status of an SSD. So you can perform performance tests and obtain an overall Health Status evaluation to view detailed information on SSDs, such as space used in the device, temperature of the device, total number of bytes written, S.M.A.R.T status, number of erased processes and number of blocks. *Download software from SP official website. Guaranteed reliability with Bad Block Management. The A55 is built with Bad Block Management to continually monitor and replace bad blocks to extend the service life of the SSD and keep the system in good condition. Supports multiple techniques. The A55 is one of the lightest and thinnest SSDs of its class, but with no moving parts, it has excellent impact resistance and vibration resistance. In addition, the S.M.A.R.T. monitoring system and ECC technology allow for more secure data transfer. - Box contains 1 Silicon Power A55 Solid State Drive Fast startup and fast transfer. With a high quality controller and original syncing NAND flash memory, the A55 delivers incredibly fast transfers. Allows for quick boots, fast application loading and quick file processing. SLC Cache Technology for improved performance and longer life In particular, the A55 utilizes "SLC Cache Technology" which allows you to write all the data to the SLC portion first, leading to the highest writing performance. Additionally, this technology reduces light amplification and increases SSD durability and extends service life. Free download SSD Health Status Monitoring Tool - SP (Silicon Power) Toolbox Software The A55 comes with a free download SSD Health Status Monitoring Tool. -SP Toolbox Software is specifically designed to allow you to see the current health status of an SSD. So you can perform performance tests and obtain an overall Health Status evaluation to view detailed information on SSDs, such as space used in the device, temperature of the device, total number of bytes written, S.M.A.R.T status, number of erased processes and number of blocks. *Download software from SP official website. Guaranteed reliability with Bad Block Management. The A55 is built with Bad Block Management to continually monitor and replace bad blocks to extend the service life of the SSD and keep the system in good condition. Supports multiple techniques. The A55 is one of the lightest and thinnest SSDs of its class, but with no moving parts, it has excellent impact resistance and vibration resistance. In addition, the S.M.A.R.T. monitoring system and ECC technology allow for more secure data transfer. - Box contains 1 Silicon Power Ace A55 Solid State Drive ## Features - Adopts 3D NAND flash memory for high speed transmission - Excellent transfer speed for faster startups and improved overall system performance. Advanced SLC cache technology for improved performance and longer life - 7mm slim design perfect for Ultrabooks and ultra-thin laptops - - - ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BVLRFFWQ | | Additional Features | Shock Resistant | | Amazon Bestseller | #49,140 in Computers ( See Top 100 in Computers ) #302 in Internal Solid State Drives | | Brand | SP Silicon Power | | Built-In Media | 1 x Solid State Drive | | Cache Memory Installed Size | 4 | | Color | Black | | Compatible Devices | Laptop | | Connectivity Technology | SATA | | Customer Package Type | FFP | | Customer Reviews | 4.5 4.5 out of 5 stars (13,970) | | Data Transfer Rate | 500 Megabytes Per Second | | Digital Storage Capacity | 4000 GB | | Enclosure Material | 3D Nand Flash | | Form Factor | 2.5-inch | | Global Trade Identification Number | 00886576069678 | | Hard Disk Description | Solid State Drive | | Hard Disk Form Factor | 2.5 Inches | | Hard Disk Interface | Serial ATA-600 | | Hard-Drive Size | 4 TB | | Hardware Connectivity | SATA 6.0 Gb/s | | Installation Type | SSD | | Item Weight | 50 g | | Manufacturer | SP Silicon Power | | Media Speed | 500.0 | | Mfr Part Number | SP004TBSS3A55S25AY | | Model Name | A55 4TB | | Model Number | SP004TBSS3A55S25 | | Number of Items | 1 | | Read Speed | 500 Megabits Per Second | | Specific Uses For Product | Business, Multimedia, Personal, Game | | UPC | 886576069678 | ## Product Details - **Brand:** SP Silicon Power - **Color:** Black - **Compatible Devices:** Laptop - **Connectivity Technology:** SATA - **Digital Storage Capacity:** 4000 GB - **Hard Disk Description:** Solid State Drive - **Hard Disk Form Factor:** 2.5 Inches - **Hard Disk Interface:** Serial ATA-600 - **Installation Type:** SSD - **Special Feature:** Shock Resistant ## Images ![Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5" 7mm (0.28") Internal Solid State Drive (SP004TBSS3A55S25) - Image 1](https://m.media-amazon.com/images/I/71+0WTZmyAL.jpg) ![Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5" 7mm (0.28") Internal Solid State Drive (SP004TBSS3A55S25) - Image 2](https://m.media-amazon.com/images/I/71+BjZfo6HL.jpg) ![Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5" 7mm (0.28") Internal Solid State Drive (SP004TBSS3A55S25) - Image 3](https://m.media-amazon.com/images/I/81Zqv7X5jRL.jpg) ![Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5" 7mm (0.28") Internal Solid State Drive (SP004TBSS3A55S25) - Image 4](https://m.media-amazon.com/images/I/717hGL+EO8L.jpg) ![Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5" 7mm (0.28") Internal Solid State Drive (SP004TBSS3A55S25) - Image 5](https://m.media-amazon.com/images/I/81EJVgSFJNL.jpg) ## Available Options This product comes in different **Size, Style** options. ## Questions & Answers **Q: What is tbw for s55 ?? hopefully i can get the answer from the manufacturer** A: @Carson - to answer your question, the OP was asking what the TBW for the S55 series of drives from Silicon Power is. First some preliminary info: Unfortunately, the question was probably asked incorrectly, at least the vendor appears to believe so as the vendor provided the info for the A55 series. The S55 series is in sizes 120GB, 240GB, 480GB, and 960GB. The A55 series is in sizes (in GB) of 128, 256, 512 (and in TB) 1, 2, 4, 8, 16TB. All things being equal, they are relatively the same in performance specifications (S55 and A55 of nearly same sizes). However, the S55 series is pretty much defunct by now, though you can still find them available. Now, on to answer your question: TBW stands for Total Bytes Written. It is the standard of measure for how long the SSD drive will last, or more correctly, how long you can still write to it. In layman's terms, SSD drives can only have data written to them so many times (in actuality it is the "erase" function which clears a block of space on the drive that this really relates to) and so they in a sense "get used up" after a period of time. All in all it boils down to the old MTBF (Mean Time Before Failure) that regular magnetic hard drives (HDDs) are measured against. TBW is generally measured in Terabytes (unless otherwise stated) so as an example, if you have a 512GB (Gigabyte) SSD drive that has a TBW of 250 it means that you can write up to 250 Terabytes of data on the drive before you can no longer write to it. In this example, that means you could completely write to the entire drive (and erase/overwrite it) 500 times (512GB being half a Terabyte relatively). Once you have reached the TBW of the drive, you could no longer write to it, though you can continue to read the existing data on it for as long as the drive works "electronically". Hope that answers your question as well as possible. **Q: Does it have power failure protection?** A: does it matter? the purpose of power loss protection is to write data from the dram cache to nand (flash) in the event of power loss. If an SSD does not have dram cache (such as this), there are no writes to in dram to protect. does that necessarily mean a drive is good or will survive a power loss? depends on firmware-if done correctly, yes. dram is much faster, so for high end drives, dram is almost a necessity. some of them with dram to hit high performance numbers do not have power loss capacitors...if you're looking for an application or use case that needs both the performance of dram caching and power loss protection of that dram cache, you likely already know enough to know the answer. if you don't have one of those use cases, power loss protection is really a moot point. This is not a drive someone would use for a ZFS ZIL, or a virtual machine swap file datastore, or big SQL server temp db.. **Q: Is this a good boot drive?** A: I used to own a comp company..still build several high end rigs a year and enequivacly can say these are excellent "not " drives. Very stable through all functions esp here in Hawaii with sometime spotty power supply. Rgds and aloha Tim **Q: Anyone else have problems with this drive not registering on userbenchmark?** A: I have not had any issues at all with this drive. I just recently installed it on my pc and it works perfectly ## Frequently Bought Together - SP Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5'' 7mm (0.28'') Internal Solid State Drive (SP004TBSS3A55S25) - BENFEI SATA Cable III, 3 Pack SATA Cable III 6Gbps Straight HDD SDD Data Cable with Locking Latch 18 Inch Compatible for SATA HDD, SSD, CD Driver, CD Writer - Black - Silicon Power 2TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5" 7mm (0.28") SSD Internal Solid State Drive (SP002TBSS3A55S25) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/743131510-silicon-power-4tb-ssd-3d-nand-a55-slc-cache-performance](https://www.desertcart.co.uk/products/743131510-silicon-power-4tb-ssd-3d-nand-a55-slc-cache-performance) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-30*