Das Dateiformat bleibt in der Sicherungskopie gleich.

German very often combines nouns into a single compound noun.
So:

• Datei = file
• Format = format

Together, Dateiformat means file format.

This is extremely common in German. The last part usually determines the grammatical gender, so because das Format is neuter, das Dateiformat is also neuter.

Because the base noun is das Format, which is a neuter noun in German.

So:

• das Format
• das Dateiformat

In German compounds, the final noun controls the gender, plural, and basic grammatical behavior of the whole word.

In a normal German main clause, the finite verb usually comes in second position.

Here the sentence is:

• Das Dateiformat = subject
• bleibt = finite verb
• in der Sicherungskopie = prepositional phrase
• gleich = predicate adjective

So the structure is:

Subject + Verb + Rest

This is one of the most basic German word order rules.

Bleibt comes from bleiben, which means to remain or to stay.

So the sentence is not just saying that the file format is the same, but that it remains the same, meaning it does not change.

Compare:

• Das Dateiformat ist gleich. = The file format is the same.
• Das Dateiformat bleibt gleich. = The file format remains the same.

Using bleibt emphasizes no change.

It is in the dative case.

The preposition in can take either:

• accusative for movement into something
• dative for location in something

Here there is no movement; it is a location or context:

• in der Sicherungskopie = in the backup copy

So German uses the dative:

• die Sicherungskopie → in der Sicherungskopie

A common way to think about it is:

• wo? = where? → usually dative
• wohin? = to where? → usually accusative with two-way prepositions like in

Because Sicherungskopie is a feminine noun: die Sicherungskopie.

After in with a static location, the noun goes into the dative case. The dative singular article for feminine nouns is der.

So:

• nominative: die Sicherungskopie
• dative: der Sicherungskopie

That is why the sentence has in der Sicherungskopie.

Sicherungskopie literally means backup copy.

It is another compound noun:

• Sicherung = protection / backup / securing
• Kopie = copy

In computer-related contexts, Sicherungskopie usually means a backup or backup copy.

Depending on context, English might translate it simply as backup.

Here gleich is acting as a predicate adjective, connected to the subject by bleibt.

German often places this kind of information near the end of the clause:

• Das Dateiformat bleibt ... gleich.

This is natural German word order.

The important point is that gleich is describing the subject das Dateiformat, not directly modifying a noun before it.

Because gleich here is a predicate adjective, not an adjective placed directly before a noun.

In German:

• Attributive adjective: before a noun, with endings
  
  • das gleiche Dateiformat
• Predicate adjective: after sein, werden, bleiben, etc., with no ending
  
  • Das Dateiformat bleibt gleich.

So in this sentence, gleich stays in its basic form.

Here it means the same or unchanged.

German gleich has several meanings depending on context, for example:

• gleich = same / identical / unchanged
• gleich = right away / in a moment

In this sentence, because it is describing Dateiformat, it clearly means the same.

So bleibt gleich = remains the same.

Yes, in some contexts you could say:

• Das Dateiformat bleibt in der Sicherungskopie dasselbe.

That would also mean that the file format remains the same.

But gleich is very natural here and often sounds simpler.
A rough difference is:

• gleich = unchanged / the same
• dasselbe = the very same one

In many practical contexts like this one, gleich is the more straightforward choice.

Because in German, all nouns are capitalized.

So in this sentence:

• Dateiformat
• Sicherungskopie

are capitalized because they are nouns.

This is a standard rule in German spelling, unlike English.

Yes, it is in the present tense:

• bleibt = present tense of bleiben

German uses the present tense very often, including for:

• general facts
• current situations
• sometimes even future meaning when the context is clear

Here it expresses a general statement or fact: the file format remains the same in the backup copy.

It is more naturally understood as within the backup copy / in the backup version / in the backup.

In technical language, German often uses in not only for physical location but also for something like:

• in a document
• in a file
• in a version
• in a backup

So this phrase is not necessarily about literal physical space. It is about the state or form of something within that backup copy.

A useful breakdown is:

• Das Dateiformat = subject
• bleibt = verb
• in der Sicherungskopie = prepositional phrase
• gleich = predicate adjective / subject complement

So the overall pattern is:

Subject + Verb + Prepositional phrase + Complement

That makes the core meaning:

The file format remains the same in the backup copy.