---
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: "E£ 66038"
currency: EGP
in_stock: true
reviews_count: 10
category: "Sp Silicon Power"
url: https://www.desertcart.com.eg/products/743131510-silicon-power-4tb-ssd-3d-nand-a55-slc-cache-performance
store_origin: EG
region: Egypt
---

# 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:** E£ 66038
**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?** E£ 66038 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.eg](https://www.desertcart.com.eg/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. High quality controller and original NAND flash memory for syncing, the A55 delivers incredible high-speed transfers. Allows for quick startup, fast loading of applications, and faster file processing. SLC Cache Technology for better performance and longer life The A55 uses SLC Cache Technology, which is especially possible to start writing all your data into the SLC area to deliver the best writing performance. In addition, this technology reduces light amplification and increases SSD durability and service life. Free download SSD Health Status Monitoring Tool-SP Toolbox Software The A55 comes with a free download SSD Health Status monitoring tool. -SP Toolbox Software is specifically designed to allow you to instantly see the current Health Status of the SSD. Therefore, you can perform performance tests and gain an overall Health Status assessment to see more information about the SSD, such as used space of equipment, temperature of the equipment, total number of bytes written, S.M.A.R.T status, erasing process status, and number of blocks. *Download the software from the official SP website. Ensure reliability with Bad Block Management. The A55 is built with Bad Block Management, which continuously monitors and replaces bad blocks to extend the service life of the SSD and keep your system in good condition. Multiple Techniques The A55 is one of the lightest and thinnest SSDs of its kinds, but it has no moving parts and has excellent shock resistance and vibration resistance. In addition, the S.M.A.R.T. monitoring system and ECC technology allow you to expect more secure data transfer. - Box contains 1 Silicon Power A55 Solid State Drive Fast start and transfer fast High quality controller and original NAND flash memory for syncing, the A55 delivers incredible high-speed transfers. Allows for quick startup, fast loading of applications, and faster file handling. SLC Cache Technology for better performance and longer life The A55 uses SLC Cache Technology, which is especially possible to start writing all your data into the SLC area to deliver the best writing performance. In addition, this technology reduces light amplification and increases SSD durability and service life. Free download SSD Health Status Monitoring Tool-SP Toolbox Software The A55 comes with a free download SSD Health Status monitoring tool. -SP Toolbox Software is specifically designed to allow you to instantly see the current Health Status of the SSD. Therefore, you can perform performance tests and gain an overall Health Status assessment to see more information about the SSD, such as used space of equipment, temperature of the equipment, total number of bytes written, S.M.A.R.T status, erasing process status, and number of blocks. *Download the software from the official SP website. Ensure reliability with Bad Block Management. The A55 is built with Bad Block Management, which continuously monitors and replaces bad blocks to extend the service life of the SSD and keep your system in good condition. Multiple Techniques The A55 is one of the lightest and thinnest SSDs of its kinds, but it has no moving parts and has excellent shock resistance and vibration resistance. In addition, the S.M.A.R.T. monitoring system and ECC technology allow you to expect more secure data transfer. - Box contains 1 Silicon Power Ace A55 Solid State Drive

Review: 2個セットがお得でした。スピードもストレスの無い程度で満足しています。
Review: 最近、ＳＰ製のメモリやＳＳＤを好んで使用しています。特に問題もなく性能も良いので、これからも良い品があれば購入し使用してみたいと思います。

## Features

- Adopts 3D NAND flash memory for high-speed transfers
- Superior transfer speeds allow for faster startup and improved overall system performance. Advanced SLC cache technology for improved performance and longer life
- Slim 7mm design perfect for ultrabooks and ultra-thin laptops

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | SP Silicon Power |
| Manufacturer | SP Silicon Power |
| Series | A55 4TB |
| Product Dimensions | 10 x 6.99 x 0.7 cm; 50 g |
| Item model number | SP004TBSS3A55S25AY |
| Color | Black |
| Form Factor | 2.5-inch |
| Item dimensions W x H | 10 x 7 x 0.7 cm |
| Hard Drive Size | 4 TB |
| Hard Disk Description | Solid State Drive |
| Hard Drive Interface | Serial ATA-600 |
| Are Batteries Included | No |
| Item Weight | 50 g |

## Product Details

- **Digital Storage Capacity:** 4000 GB
- **Hard Disk Interface:** Serial ATA-600
- **Connectivity Technology:** SATA
- **Brand:** SP Silicon Power
- **Special Feature:** Shock Resistant
- **Hard Disk Form Factor:** 2.5 Inches
- **Hard Disk Description:** Solid State Drive
- **Compatible Devices:** Laptop
- **Installation Type:** SSD
- **Color:** Black

## 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)

## 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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by り***ー on June 5, 2025*

2個セットがお得でした。スピードもストレスの無い程度で満足しています。

### ⭐⭐⭐⭐⭐ Review
*by と***ー on February 16, 2025*

最近、ＳＰ製のメモリやＳＳＤを好んで使用しています。特に問題もなく性能も良いので、これからも良い品があれば購入し使用してみたいと思います。

### ⭐⭐⭐⭐⭐ Review
*by ち***ち on August 2, 2025*

すごくコスパのいいSSDだと思います。 256GBを使用しいますが 7年程度で累計1,369,100TB(約1.3ペタバイト)書き込んだようですがまだデータ損失等はなく動き続けています。

## 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.com.eg/products/743131510-silicon-power-4tb-ssd-3d-nand-a55-slc-cache-performance](https://www.desertcart.com.eg/products/743131510-silicon-power-4tb-ssd-3d-nand-a55-slc-cache-performance)

---

*Product available on Desertcart Egypt*
*Store origin: EG*
*Last updated: 2026-01-22*