How MEGA Shared-Link Encryption Works: The Meaning of the # and Decryption Key
At first glance, a MEGA public link looks like another long web address. Technically, however, the portion associated with the # plays an important role in separating information used to locate encrypted content from key material handled by the client.
The surprising part is that information placed in a URL fragment—the portion after #—is normally handled locally by the browser rather than being included in the HTTP request sent to the web server.
MEGA has historically used this property as part of its public-link architecture. Its security documentation describes public links containing information sufficient for the client to locate encrypted content and decrypt it, while noting that information after the anchor hash remains local to the browser rather than being sent to MEGA's servers as part of that URL request.
First, What Is a Decryption Key?
The decryption key is therefore a critical component of an encrypted file-sharing system.
MEGA's security architecture is based on user-controlled end-to-end encryption. Its security documentation describes files as being encrypted on the client before they are transferred to MEGA's platform.
The recipient needs both a way to identify the encrypted object and the appropriate key material to interpret it.
What the Different Parts of a MEGA Link Do
A modern plaintext MEGA file link can conceptually be represented as a MEGA file path containing a public handle followed by # and encoded key material.
For a public file link, published technical descriptions identify the portion before # with the public file handle and the portion following it with encoded key material.
Why the Hash Character Matters
The crucial technical property is that the fragment is processed on the client side rather than transmitted to the origin server as part of the HTTP request target.
The browser can retain SECRET locally while requesting the resource associated with the address before the fragment.
That behavior does not exist specifically for MEGA.
Why the Part After # Never Reaches the Server in the URL Request
That does not mean every character is transmitted to the web server in the HTTP request.
MEGA's published technical documentation specifically notes that the portion following the hash remains local to the client browser rather than being transmitted to MEGA's servers as part of the link request.
Locating Data Is Not the Same as Decrypting It
The client's possession of the appropriate key determines whether that encrypted content can be meaningfully decrypted.
Its client can use the handle to obtain the corresponding encrypted file and then use the key information to verify and decrypt the content.
This separation is one of the easiest ways to understand the system: the server can know which encrypted object is being requested without receiving the fragment from the URL request itself.
Why MEGA Needs Client-Side Cryptography
This is fundamentally different from sending an unencrypted file to a server and asking that server to protect it afterward.
Consequently, the browser or MEGA application is an active participant in the security architecture rather than merely a passive viewer.
The Link Itself Can Carry What the Recipient Needs
There is an important consequence to putting key material into a shareable link: anyone who obtains a valid complete link may have what is needed to access the shared content, subject to the link remaining valid and other applicable controls.
This is why an encrypted sharing link should itself be treated as confidential when the underlying material is confidential.
A More Deliberate Way to Share Encrypted Content
The sender can provide the link and key separately, requiring the recipient to combine the two pieces before opening the content.
Someone receiving the key without the associated valid file reference similarly lacks the complete sharing information.
Threat models matter.
Avoiding an Overly Broad Privacy Claim
This point deserves careful wording.
The browser or application executing the cryptographic code must itself be trustworthy, and the user's device must remain secure.
Cryptographic systems should be evaluated as complete systems rather than reduced to one clever URL property.
Can the Decryption Key Appear in Browser History?
A fragment remaining client-side does not mean it ceases to exist.
Forwarding the complete link forwards the key component as well.
A File Link Without Its Key Is Incomplete for Decryption
This is why users sometimes encounter MEGA links that require a separately supplied decryption key.
It is part of the cryptographic information associated with accessing the shared encrypted content.
Encryption Is Supposed to Make Missing Keys Matter
This is fundamentally different from a weak human-created password.
Encryption would offer little protection if arbitrary recipients could simply recover missing keys on demand.
Password Protection and the File Key Are Not the Same Thing
MEGA has also documented password-protected public links.
A password should not be confused with the underlying cryptographic file or folder key.
Understanding MEGA Links Without the Mystery
The # look at this site in a MEGA public link is not decorative.
The server can provide encrypted content identified through the public handle while the client has the cryptographic information needed for decryption.
Encryption protects access only while the relevant key information remains under appropriate control.
Article 2
MEGA Transfer Quota Explained: Why There Is No Single Free Download Limit
One of the most confusing parts of using MEGA is discovering that having plenty of available cloud-storage space does not necessarily mean you can continuously download or stream an unlimited amount of data.
The important fact behind MEGA's free download limit is that there is not one dependable number that applies equally to every free user at every moment.
For free users, MEGA's transfer system is influenced by network conditions and recent data transferred from the relevant IP address.
Transfer Quota Is Not Storage Space
When MEGA refers to transfer quota, it is talking about data movement rather than the amount of information occupying your cloud drive.
This distinction explains a common source of confusion.
Having an empty cupboard does not make the doorway unlimited.
Streaming Can Consume It Too
Users sometimes assume transfer quota matters only when clicking a Download button.
Streaming large media files can consume significant transfer volume even if the user never saves those files permanently to the device.
The Number Everyone Wants Is the Number MEGA Keeps Dynamic
Older forum posts frequently repeat figures such as 4 GB or 5 GB as though they were permanent universal allowances.
In May 2026, for example, a user reported downloading substantially more than the amount they had previously expected before reaching a limit. A MEGA support response explained that free quota was not a fixed 4 GB every six hours and could change with network utilization.
Consequently, saying “MEGA always gives exactly 5 GB” would be misleading.
Why MEGA Keeps Mentioning the Previous Six Hours
Recent transfer activity continues to influence available capacity as the rolling window progresses.
This helps explain why users sometimes find countdown behavior confusing.
Why Your MEGA Limit Can Be Different Tomorrow
MEGA says system utilization influences free transfer capacity.
Consequently, anecdotes from users in different regions should not automatically be treated as universal limits.
Why the Limit Is Connected to Your IP Address
For free accounts, MEGA currently says transfer quota is measured per IP address rather than simply per individual account.
Imagine several devices behind the same shared internet connection.
Free-account identity and free-transfer accounting are not necessarily the same thing.
“I Haven't Downloaded Anything—Why Am I Already Over Quota?”
A user may personally have downloaded nothing recently while still connecting through an IP address with relevant recent MEGA transfer activity.
MEGA's support explanations specifically note that users of dynamic IPs, VPNs or shared IP environments can encounter quota consumption associated with others who previously used the same IP.
Dynamic IP Addresses Make the Experience Less Predictable
Internet providers do not necessarily assign every customer one permanent public IP forever.
This is another reason universal statements such as “every free account gets exactly X GB” are unreliable.
The File Is Not Necessarily Broken
When the available free transfer quota is exhausted, MEGA can pause further transfer and display a transfer-quota-exceeded warning.
For someone who does not want to upgrade, waiting for additional free quota is the straightforward supported option.
A Multi-Gigabyte Transfer Makes the Restriction Obvious
A person downloading occasional documents may use MEGA for a long time without paying much attention to transfer quota.
This also explains why users can disagree dramatically about the service.
Storage Quota vs Transfer Quota
They are independent measurements.
Conversely, an account can contain substantial stored data without all of it being downloaded during the current transfer window.
Paid MEGA Transfer Quota Is a Different Model
MEGA's current pricing information distinguishes free accounts with limited transfer capacity from Pro plans carrying higher transfer quota.
Recent MEGA support information also distinguishes free IP-based quota measurement from Pro quota measured per user account.
Can You See Your Current Transfer Usage?
This is more useful than assuming that a number quoted in an old forum thread still applies.
Even then, a free user's future allowance should not necessarily be interpreted as permanently fixed.
Be Careful With Fixed-Quota Articles
The problem begins when those observations are transformed into a permanent official specification.
For current guidance, those statements are more relevant than an old user's remembered limit.
Why Incognito Mode Does Not Magically Create More Quota
Browser privacy controls and transfer accounting operate at different layers.
The same reasoning applies to repeatedly clearing cookies or reinstalling a browser.
The Supported Choices Are Simpler
Those approaches attempt to work around the service's intended quota mechanism and can introduce additional privacy, security or terms-related concerns.
For occasional downloads, waiting may be sufficient.
Can Watching MEGA Videos Trigger the Quota?
Playing a large video directly from MEGA can therefore contribute to the same general transfer allowance involved in downloading.
Repeated streaming of large files can consume substantial transfer volume.
Waiting Six Hours Does Not Mean Every User Gets the Same New Bucket
A dynamic quota tied to recent transfer activity and current service conditions is more complicated than a single fixed countdown.
The key concept is a rolling recent-activity window combined with dynamically available free capacity.
MEGA Transfer Quota FAQs
What Is the MEGA Free Download Limit?
MEGA does not currently describe its free transfer quota as one universal fixed GB allowance.
How Does the Six-Hour Period Work?
Available capacity itself can still vary.
Why Did MEGA Stop My Download Halfway Through?
MEGA indicates that transfer can continue when the over-quota condition resolves and more capacity becomes available.
Does Watching a Video Count as Downloading on MEGA?
Yes. MEGA states that streaming consumes transfer quota because the file's data still has to be transferred to the user's device.
Can Someone Else Use My MEGA Transfer Quota?
For free accounts, MEGA says quota is measured per IP address rather than strictly per user account.
Does Incognito Mode Reset MEGA Transfer Quota?
Because the free quota is currently described as IP-based, these browser-level changes should not be expected to create a fresh guaranteed transfer allowance.
Does 20 GB of Free Storage Mean 20 GB of Free Downloads?
The two quotas measure different resources.
How Do I Continue a MEGA Download Legitimately?
MEGA does not describe payment as the only option after the free quota is exhausted; waiting remains an option.
The MEGA Download Limit Makes More Sense Once You Stop Looking for One Number
The question “What is MEGA's exact free download limit?” assumes the system operates with a fixed allowance, while MEGA's current explanations describe something dynamic.
A person downloading several gigabytes today and considerably less—or more—another day is not necessarily seeing a malfunction.
A better rule is to treat free transfer capacity as limited and dynamic, check current usage when necessary, and expect large transfers to encounter the quota more readily than ordinary small-file use.
That may be less satisfying than a neat number, but it is considerably more accurate.