Consumul de date e mare fără ca factura să se schimbe.

E is the short, very common spoken and informal written form of este, which means is.

So:

• Consumul de date e mare = The data usage is high
• Consumul de date este mare = same meaning, just slightly more formal or neutral

Both are correct.

Literally, consumul de date means the consumption of data.

In more natural English, that usually becomes:

• data usage
• data consumption

Breakdown:

• consumul = the consumption
• de date = of data

Romanian often uses this noun + de + noun structure where English may prefer a more compact phrase.

Because consumul is the definite form: the consumption.

Romanian usually puts the definite article at the end of the noun:

• consum = consumption
• consumul = the consumption

So consumul de date literally means the data consumption or the consumption of data.

Even if English might simply say data usage without the, Romanian often uses the definite form in this kind of statement.

In Romanian, date can mean data, not just calendar dates.

Here, date is the plural noun meaning data in the technological/information sense.

So:

• date = data
• consum de date = data usage

This is a very common phrase in phone and internet contexts.

Because Romanian often uses mare in places where English would prefer high, large, or great.

Literally:

• mare = big / large

But in context:

• consumul de date e mare = data usage is high

So the meaning depends on context, just like English sometimes uses big metaphorically.

Because fără ca is a set structure used before a full clause.

Compare:

• fără schimbare = without change
  
  • here fără is followed by a noun
• fără ca factura să se schimbe = without the bill changing / without the bill being changed
  
  • here fără ca introduces a subordinate clause

A useful pattern is:

• fără ca + subject + să + verb

So in this sentence:

• fără ca factura să se schimbe = without the bill changing

Because after fără ca, Romanian normally uses the subjunctive.

The subjunctive is usually marked by să.

So the pattern is:

• fără ca ... să ...

Here:

• factura = the bill
• să se schimbe = to change / to be changed

This is one of the most important Romanian structures to learn: many connectors and expressions require să + subjunctive.

Because the sentence needs the subjunctive, not the indicative.

Compare:

• se schimbă = it changes / it is changing
  
  • indicative
• să se schimbe = that it change / to change
  
  • subjunctive

After fără ca, Romanian requires the subjunctive form, so să se schimbe is the correct choice.

Se is the reflexive marker in the verb a se schimba.

• a schimba = to change something
• a se schimba = to change, to become different, to get changed

So:

• schimb factura = I change the bill
• factura se schimbă = the bill changes

In this sentence, factura is the thing undergoing the change, so Romanian uses the reflexive form:

• factura să se schimbe

It can feel close to both in English, depending on context.

Most directly, a se schimba means:

• to change
• to become different

So factura să se schimbe most naturally means:

• the bill changes

But in English, when talking about a bill or invoice, we might also translate it as:

• the bill being changed

In this sentence, the overall idea is that data usage is high without the bill changing.

Because factura means the bill, not just a bill.

Romanian again puts the definite article at the end:

• factură = a bill / bill
• factura = the bill

The sentence is talking about a specific bill or the bill in that situation, so the definite form is natural.

Yes, it is completely natural.

The structure is:

• Consumul de date = topic/subject
• e mare = predicate
• fără ca factura să se schimbe = subordinate clause

So the sentence flows as:

• Data usage is high without the bill changing

Romanian word order is often flexible, but this version is neutral and standard.

Yes.

• Consumul de date e mare fără ca factura să se schimbe.
• Consumul de date este mare fără ca factura să se schimbe.

Both are correct.

The version with e sounds more everyday and conversational. The version with este sounds a bit more formal or careful.