Das Datenvolumen reicht für einen Monat.

Datenvolumen is a common German word for the amount of mobile or internet data available, especially in a phone contract or prepaid plan.

It is a compound noun:

• Daten = data
• Volumen = volume / amount

So literally it is something like data volume, but in natural English it often means data allowance or amount of data.

Because Datenvolumen is a neuter noun in German, so it takes the article das.

A useful thing to know is that in many German compound nouns, the last part determines the gender. Here, the last part is Volumen, and das Volumen is neuter. So:

• das Volumen
• das Datenvolumen

Reicht is the 3rd person singular form of the verb reichen.

Here, reichen means:

• to be enough
• to suffice
• to last

So in this sentence, reicht means that the data allowance is enough for that amount of time.

Examples:

• Das Geld reicht nicht. = The money isn’t enough.
• Ein Akku reicht für zwei Tage. = A battery lasts for two days.

Because this is a normal main clause in German, and in German main clauses the finite verb usually goes in position 2.

So the structure is:

• Das Datenvolumen = subject
• reicht = finite verb
• für einen Monat = prepositional phrase

This follows the standard German word order pattern.

Because für always takes the accusative case.

Monat is a masculine noun:

• nominative: der Monat
• accusative: den Monat

With the indefinite article, accusative masculine becomes:

• ein → einen

So:

• für einen Monat = for one month

That is why einem is wrong here. Einem would be dative, but für does not use the dative.

It is the object of the preposition für.

The phrase für einen Monat tells you the time span that the data allowance is enough for.

So:

• für = for
• einen Monat = one month

Together, the phrase means for one month.

Yes. In sentences like this, reichen is very commonly used to mean that something is sufficient for a period of time or purpose.

For example:

• Das Essen reicht für drei Personen. = The food is enough for three people.
• Der Tank reicht noch bis Berlin. = The tank will last until Berlin.
• Das Geld reicht für eine Woche. = The money will last for a week.

So reichen often combines the ideas of being enough and lasting.

It is singular here.

The sentence is talking about the data allowance as one whole amount:

• Das Datenvolumen reicht ...

Even though Daten looks plural, that is just the first part of the compound noun. The full noun Datenvolumen is singular.

Its plural does exist, but it is less common in everyday use:

• die Datenvolumen

In most real-life situations, people usually talk about it in the singular.

Normally, no. The natural and standard expression is:

• für einen Monat reichen

German usually uses für with reichen when you say what something is enough for over a period of time.

So:

• Das Datenvolumen reicht für einen Monat. = natural
• Das Datenvolumen reicht einen Monat. = not natural in standard German

Yes, but it changes the structure slightly.

You could say:

• Das Datenvolumen reicht einen Monat lang.

This is understandable and natural. ... lang emphasizes the duration: for a whole month / for one month long.

But reicht für einen Monat is probably the most common and straightforward version in this context.

Usually, yes.

In everyday German, Datenvolumen is most often used for:

• mobile data
• internet plans
• prepaid or contract allowances

So many learners will hear it in contexts like:

• Mein Datenvolumen ist fast aufgebraucht. = My data allowance is almost used up.
• Wie viel Datenvolumen hast du? = How much data do you have?

Yes. Both are good translations, depending on the context.

• is enough for a month focuses on sufficiency
• lasts for a month focuses on duration

German reichen can cover both ideas here, which is why English may use either version.

A couple of small things may be helpful:

• Daten is pronounced roughly DAH-ten
• Volumen is roughly voh-LOO-men
• The stress in Volumen is on lu
• In the compound Datenvolumen, the main stress is usually on vo or lu depending on speaking rhythm, but learners mainly need to pronounce it clearly in parts

A simple learner-friendly breakdown is:

• Daten-volumen

You do not need to pronounce it as one blurred block. Clear syllables are better than trying to sound fast too early.