---
product_id: 40605308
title: "Mediasonic PRORAID 4 Bay 3.5\" SATA Hard Drive Enclosure - USB 3.0 & eSATA 12TB Support (HFR7-SU3S2)"
brand: "mediasonic"
price: "€ 27.67"
currency: EUR
in_stock: false
reviews_count: 8
url: https://www.desertcart.gr/products/40605308-mediasonic-proraid-4-bay-3-5-sata-hard-drive-enclosure
store_origin: GR
region: Greece
---

# USB 3.0 @ 5Gbps & eSATA up to 6Gbps 4 bays, up to 12TB each Hardware RAID 0/1/3/5/10 with 1-button control Mediasonic PRORAID 4 Bay 3.5" SATA Hard Drive Enclosure - USB 3.0 & eSATA 12TB Support (HFR7-SU3S2)

**Brand:** mediasonic
**Price:** € 27.67
**Availability:** ❌ Out of Stock

## Summary

> 🚀 Elevate your data game with speed, space, and smart RAID control!

## Quick Answers

- **What is this?** Mediasonic PRORAID 4 Bay 3.5" SATA Hard Drive Enclosure - USB 3.0 & eSATA 12TB Support (HFR7-SU3S2) by mediasonic
- **How much does it cost?** € 27.67 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/40605308-mediasonic-proraid-4-bay-3-5-sata-hard-drive-enclosure)

## Best For

- mediasonic enthusiasts

## Why This Product

- Trusted mediasonic brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart Cooling System:** Front air intake and smart fan with temperature sensor keep drives cool under pressure.
- • **Versatile RAID Modes:** Built-in hardware RAID controller with easy one-button setup for RAID 0,1,3,5,10 configurations.
- • **Plug & Play Simplicity:** Supports SATA I/II/III drives with S.M.A.R.T. monitoring and power sync for hassle-free operation.
- • **Blazing Fast Connectivity:** USB 3.0 and eSATA interfaces deliver transfer speeds up to 6Gbps for seamless workflows.
- • **Massive Storage Powerhouse:** Supports up to 48TB total with 4 bays for ultimate data capacity.

## Overview

The Mediasonic PRORAID 4 Bay SATA Hard Drive Enclosure is a robust external storage solution designed for professionals needing up to 48TB of RAID-configured storage. Featuring USB 3.0 and eSATA connectivity, it offers fast data transfer rates and supports multiple RAID modes with a built-in hardware controller. Its smart cooling system and S.M.A.R.T. support ensure reliability, making it ideal for managing large data workloads with ease.

## Description

desertcart.com: Mediasonic PRORAID 4 Bay 3.5" SATA Hard Drive Enclosure - USB 3.0 & eSATA 12TB Support (HFR7-SU3S2) : Electronics

Review: Working as expected... - Wanted a cheap Pi based NAS and this works perfectly. Unit shipped with a non-vented door. Vendore replied within 24 and promised to ship a vented door. Received the new door in a few days and replaced quickly and easily. Definitely not the highest quality hardware, but I was looking for a simple and cheap external RAID enclosure. So far, this is working perfectly and support has been great.
Review: Unacceptably low write speeds. See latest update for array rebuild issues. - I've reached out to Mediasonic to resolve this issue, and I will update once that is resolved. It will be worth 5 stars if it is, because other than this issue the product seems great. I set up 4 8TB WD Red drives in a RAID-5 array. Read speeds are great, however I noticed while migrating data that the write speeds started off slow (~70MBps) and dropped to an insane ~5MBps with larger files once they hit a certain point (I'm not sure of the exact point, but probably somewhere around 3GB). (UPDATE: The threshold is actually 4GB) In reading the Mediasonic forums, it appears that drives larger than 6TB are only supported in HW Rev 3 of the product. The one I received is not Rev 3 (there is no revision noted on the back, exactly like the person who reported the issue in the forum). There is no indication of this issue in the product description or the manual that comes with the product - everything simply says that it supports drives up to 12TB. (UPDATE: Rev 3 only applies to the HFR2-SU3S2 so that is irrelevant to this issue) I've reached out to Mediasonic, and I'll update the review when that process is complete. I've heard good things about Mediasonic support, so I hope that the resolution will be a positive one rather than returning the product in favor of a different RAID solution altogether. UPDATE: After working with Mediasonic, I'm going to exchange the unit for another one. We ran through a ton of different troubleshooting steps, but to no avail. One thing to note is that the write speeds are the same whether I use eSATA or USB 3. That definitely points to something funky going on rather than an issue with, say, driver/firmware/chipset incompatibility. I'm still holding off changing the star rating until it's resolved one way or another. UPDATE 2: Replacing the unit did not resolve the issue. At this point I'm going to just deal with it and raise it to a 2-star review (I reserve 1-star reviews for stuff that is totally unusable and has to be returned). To sum up, I tried the unit connected to the following: - Built-in Marvell eSATA controller - PCIe ASMedia eSATA controller - Built-in USB 3.0 controller The write speeds, per AJA System Test, were 5-6MBps no matter how it was connected. I recreated the array per Mediasonic's suggestion, but that provided no improvement. The only thing that remained constant was the drives themselves, however I tested them in single mode and the write speeds were great. This is purely an issue with RAID-5 mode. Mediasonic support was great, even though my issue was not resolved. They definitely tried their best. UPDATE 3: After changing absolutely nothing, the write speeds have improved. While they're still not great (~30MBps in disk test tools, ~20MBps in real-world file copy tests), they're a fair sight better than they were. This makes the device eminently more usable, and I will add a star to my rating. The whole ordeal makes me wonder if there's something about this device that requires a couple of weeks to settle in before its I/O works up to its potential. UPDATE 3: I had to replace a failed hard disk in the RAID-5 array, and found another serious issue with the enclosure. Rebuilding takes forever, and renders the logical volume practically unusable. I thought it was just a quirk of my setup, but I found people on YouTube describing exactly the same thing. Mediasonic estimates about an hour to rebuild 200GB. My array is 24TB, so I'm looking at five days to complete the rebuild, and thus five days that the data on the array will be practically inaccessible. I should note that the data is *there*, it's just that both read and write are so slow that they cause timeouts for any applications that try to use data stored there. I hope I'm not jinxing myself, but I really hope that there isn't another drive failure in the insanely long time it's going to take this rebuild to finish.

## Features

- Newly revised front door with Air In-Take feature. Hardware Raid controller built-in on board with one-button control. Support Single Drive Mode, Raid 0 / 1 / 3 / 5 / 10
- Support 3.5" SATA I / II / III hard disk drive up to 12TB per drive, and 2.5” SATA hard disk drive. (Not compatible with 4Kn Native Drives)
- Transfer rate up to 5.0Gbps via USB 3.0, up to 6.0Gbps via eSATA (Single Mode), and 3.0Gbps via eSATA (Raid Mode)
- Support S.M.A.R.T., and Power Off in Synchronization with Computer (Does not support Auto Power-On)
- Smart Fan with built-in temperature sensor, Auto & Manual modes, and 3 speed levels

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B06XC24ZX5 |
| Brand | Mediasonic |
| Color | Black |
| Compatible Devices | Laptop |
| Customer Reviews | 3.8 out of 5 stars 46 Reviews |
| Enclosure Material | Metal |
| Hard Disk Form Factor | 3.5 Inches |
| Hardware Interface | USB 3.0 |
| Item Weight | 3.7 Pounds |
| Manufacturer | Mediasonic |
| Material | Metal |
| Memory Storage Capacity | 10 TB |
| Supported Devices Quantity | 4 |
| UPC | 629329001569 |

## Images

![Mediasonic PRORAID 4 Bay 3.5" SATA Hard Drive Enclosure - USB 3.0 & eSATA 12TB Support (HFR7-SU3S2) - Image 1](https://m.media-amazon.com/images/I/51PUjVSzONL.jpg)
![Mediasonic PRORAID 4 Bay 3.5" SATA Hard Drive Enclosure - USB 3.0 & eSATA 12TB Support (HFR7-SU3S2) - Image 2](https://m.media-amazon.com/images/I/51NVWpdmd-L.jpg)
![Mediasonic PRORAID 4 Bay 3.5" SATA Hard Drive Enclosure - USB 3.0 & eSATA 12TB Support (HFR7-SU3S2) - Image 3](https://m.media-amazon.com/images/I/61MeUe9hQ4L.jpg)
![Mediasonic PRORAID 4 Bay 3.5" SATA Hard Drive Enclosure - USB 3.0 & eSATA 12TB Support (HFR7-SU3S2) - Image 4](https://m.media-amazon.com/images/I/61Z1PU5JAYL.jpg)
![Mediasonic PRORAID 4 Bay 3.5" SATA Hard Drive Enclosure - USB 3.0 & eSATA 12TB Support (HFR7-SU3S2) - Image 5](https://m.media-amazon.com/images/I/51gqO0AMdfL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Working as expected...
*by K***G on October 29, 2019*

Wanted a cheap Pi based NAS and this works perfectly. Unit shipped with a non-vented door. Vendore replied within 24 and promised to ship a vented door. Received the new door in a few days and replaced quickly and easily. Definitely not the highest quality hardware, but I was looking for a simple and cheap external RAID enclosure. So far, this is working perfectly and support has been great.

### ⭐⭐⭐ Unacceptably low write speeds. See latest update for array rebuild issues.
*by M***S on August 15, 2019*

I've reached out to Mediasonic to resolve this issue, and I will update once that is resolved. It will be worth 5 stars if it is, because other than this issue the product seems great. I set up 4 8TB WD Red drives in a RAID-5 array. Read speeds are great, however I noticed while migrating data that the write speeds started off slow (~70MBps) and dropped to an insane ~5MBps with larger files once they hit a certain point (I'm not sure of the exact point, but probably somewhere around 3GB). (UPDATE: The threshold is actually 4GB) In reading the Mediasonic forums, it appears that drives larger than 6TB are only supported in HW Rev 3 of the product. The one I received is not Rev 3 (there is no revision noted on the back, exactly like the person who reported the issue in the forum). There is no indication of this issue in the product description or the manual that comes with the product - everything simply says that it supports drives up to 12TB. (UPDATE: Rev 3 only applies to the HFR2-SU3S2 so that is irrelevant to this issue) I've reached out to Mediasonic, and I'll update the review when that process is complete. I've heard good things about Mediasonic support, so I hope that the resolution will be a positive one rather than returning the product in favor of a different RAID solution altogether. UPDATE: After working with Mediasonic, I'm going to exchange the unit for another one. We ran through a ton of different troubleshooting steps, but to no avail. One thing to note is that the write speeds are the same whether I use eSATA or USB 3. That definitely points to something funky going on rather than an issue with, say, driver/firmware/chipset incompatibility. I'm still holding off changing the star rating until it's resolved one way or another. UPDATE 2: Replacing the unit did not resolve the issue. At this point I'm going to just deal with it and raise it to a 2-star review (I reserve 1-star reviews for stuff that is totally unusable and has to be returned). To sum up, I tried the unit connected to the following: - Built-in Marvell eSATA controller - PCIe ASMedia eSATA controller - Built-in USB 3.0 controller The write speeds, per AJA System Test, were 5-6MBps no matter how it was connected. I recreated the array per Mediasonic's suggestion, but that provided no improvement. The only thing that remained constant was the drives themselves, however I tested them in single mode and the write speeds were great. This is purely an issue with RAID-5 mode. Mediasonic support was great, even though my issue was not resolved. They definitely tried their best. UPDATE 3: After changing absolutely nothing, the write speeds have improved. While they're still not great (~30MBps in disk test tools, ~20MBps in real-world file copy tests), they're a fair sight better than they were. This makes the device eminently more usable, and I will add a star to my rating. The whole ordeal makes me wonder if there's something about this device that requires a couple of weeks to settle in before its I/O works up to its potential. UPDATE 3: I had to replace a failed hard disk in the RAID-5 array, and found another serious issue with the enclosure. Rebuilding takes forever, and renders the logical volume practically unusable. I thought it was just a quirk of my setup, but I found people on YouTube describing exactly the same thing. Mediasonic estimates about an hour to rebuild 200GB. My array is 24TB, so I'm looking at five days to complete the rebuild, and thus five days that the data on the array will be practically inaccessible. I should note that the data is *there*, it's just that both read and write are so slow that they cause timeouts for any applications that try to use data stored there. I hope I'm not jinxing myself, but I really hope that there isn't another drive failure in the insanely long time it's going to take this rebuild to finish.

### ⭐⭐⭐⭐ Easy and Simple. Works as advertised
*by W***S on August 5, 2019*

Received the ProRaid and was up and running with a 15TB RAID 5 array in less than 30 minutes. Using USB3 on a Mac Mini the transfer speeds from another USB3 device are around 100-130mbs for a 4TB total file transfer. Device is extremely quiet and works exactly as advertised.

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-03-02*