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The device itself is recognized by Windows so it is mounted on the next available drive letter. Then the decrypted volume also needs to be accessed so it gets its own drive letter also. This is entirely normal behavior for 3rd party volume encryption tools on Windows.<br />
<br />
You should be able to go to the Disk Management section of the Management console and unassign the drive letter from the encrypted volume. Most volume encryption tools will still recognize the device and you can mount the encrypted volume without the annoying 2nd drive letter.
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The device itself is recognized by Windows so it is mounted on the next available drive letter. Then the decrypted volume also needs to be accessed so it gets its own drive letter also. This is entirely normal behavior for 3rd party volume encryption tools on Windows.

You should be able to go to the Disk Management section of the Management console and unassign the drive letter from the encrypted volume. Most volume encryption tools will still recognize the device and you can mount the encrypted volume without the annoying 2nd drive letter.

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But why can't the software show a single encrypted drive. Why 2 drives?
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But why can't the software show a single encrypted drive. Why 2 drives?

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I brought Sony HD-SL1/SL2 1TB external hard disk.<br />
<br />
I downloaded software to encrypt the hard drive from sony website. Once i downloaded and installed the encryption on the external hard disk two drives were created.<br />
<br />
Drive D: Containing encryption software (around 1GB size)<br />
Drive E: Where i can store files (around 1TB size)<br />
<br />
Why does running encryption result in 2 drives?<br />
<a href="https://filedb.experts-exchange.com/incoming/2015/10_w41/951013/EncryptedDrive.png" target="_blank" class="file-inline" title="Encryption creating 2 drives (35 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>EncryptedDrive.png</a>
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EncryptedDrive.png

I brought Sony HD-SL1/SL2 1TB external hard disk.

I downloaded software to encrypt the hard drive from sony website. Once i downloaded and installed the encryption on the external hard disk two drives were created.

Drive D: Containing encryption software (around 1GB size)
Drive E: Where i can store files (around 1TB size)

Why does running encryption result in 2 drives?

Running encryption on external hard disk causes a extra drive

Encryption is the process of encoding messages or information in such a way that only authorized parties can read it. In an encryption scheme, the intended communication information or message, referred to as plaintext, is encrypted using an encryption algorithm, generating ciphertext that can only be read if decrypted. For technical reasons, an encryption scheme usually uses a pseudo-random encryption key generated by an algorithm. An authorized recipient can easily decrypt the message with the key provided by the originator to recipients, but not to unauthorized interceptors.

Encryption

Storage devices include any device used for storing and retrieving digital information. Hard disk drives (HDDs) use one or more rigid ("hard") rapidly rotating disks (platters) coated with magnetic material. Data is accessed in a random-access manner, meaning that individual blocks of data can be stored or retrieved in any order and not only sequentially. The primary competing technology for secondary storage is flash memory in the form of solid-state drives (SSDs), but HDDs remain the dominant medium for secondary storage due to advantages in price per bit and per-device recording capacity. CD-RW (Compact Disc-ReWritable) is a digital optical disc storage format that allows information to be stored outside the mechanical HDD.

Storage Hardware

Hardware includes cell phones and other digital living devices, tablets, computers, servers, peripherals and components, printers and scanners, gaming consoles, networking hardware such as routers, hubs, switches and modems, storage devices and security equipment such as firewalls and other appliances.