Wir beschriften die Sicherungskopie.

Because the subject is wir = we.

In the present tense, beschriften is conjugated like this:

• ich beschrifte — I label
• du beschriftest — you label
• er/sie/es beschriftet — he/she/it labels
• wir beschriften — we label
• ihr beschriftet — you all label
• sie/Sie beschriften — they / you (formal) label

So Wir beschriften ... means We label ...

Beschriften means to label, to mark with writing, or to put a label on something.

It is built from:

• Schrift = writing, script
• the prefix be-, which often turns a noun or idea into a verb that acts directly on an object

So etwas beschriften means to label something.

Examples:

• Wir beschriften die Ordner. — We label the folders.
• Bitte beschriften Sie die Kartons. — Please label the boxes.

No. Beschriften is not separable.

That matters because in German, some verbs split in a main clause, but beschriften does not.

So you say:

• Wir beschriften die Sicherungskopie.

Not:

• Wir schriften die Sicherungskopie be. ✗

The prefix be- is an inseparable prefix, like in many common verbs such as:

• bezahlen — to pay
• beginnen — to begin
• beschreiben — to describe

Die is the definite article for the noun Sicherungskopie.

The word Sicherungskopie is a feminine noun, so its basic form is:

• die Sicherungskopie — the backup copy

In this sentence, it is the direct object of beschriften, and feminine nouns keep die in both the nominative and accusative:

• nominative: die Sicherungskopie
• accusative: die Sicherungskopie

So the form does not change here.

Because the subject is already clearly given: Wir.

German main-clause word order usually puts the conjugated verb in second position:

• Wir = subject
• beschriften = verb
• die Sicherungskopie = object

So the structure is:

• Wir — we
• beschriften — label
• die Sicherungskopie — the backup copy

In other words: We label the backup copy.

It is a compound noun:

• Sicherung = protection, backup, safeguarding
• Kopie = copy

Together, Sicherungskopie means backup copy.

German often combines words into one long noun. English usually writes these as two words, but German writes them as one:

• Sicherungskopie — backup copy
• Krankenhaus — hospital
• Handschuh — glove

Often, yes, in meaning. But there is a slight difference in style.

• Sicherungskopie is a more native German term
• Backup is also widely used in modern German, especially in IT contexts

Depending on context, Germans might say:

• eine Sicherungskopie erstellen
• ein Backup machen
• ein Backup erstellen

So Sicherungskopie is perfectly normal, but Backup is also very common.

They are capitalized for different reasons:

• Wir is capitalized because it is the first word in the sentence.
• Sicherungskopie is capitalized because all German nouns are capitalized.

That is one of the big differences from English.

Examples:

• das Buch — the book
• eine Datei — a file
• die Sicherungskopie — the backup copy

Yes, sometimes.

Wir beschriften die Sicherungskopie most naturally means We are labeling the backup copy or We label the backup copy, depending on context.

But in the right situation, German present tense can also refer to the near future:

• Morgen beschriften wir die Sicherungskopie. — Tomorrow we will label the backup copy.

German often uses the present tense where English might prefer will or be going to.

Both are possible, but the best English translation depends on context.

• We label the backup copy can sound like a habitual action or a step in a process.
• We are labeling the backup copy sounds like it is happening right now.

German Wir beschriften die Sicherungskopie does not itself force that distinction the way English often does. German present tense can cover both.

A simple learner-friendly pronunciation guide is:

ZI-khe-rungs-ko-PEE

More carefully:

• Si in Sicherung sounds like zi
• ch in sicher is the soft German ch sound
• -ung sounds like oong
• Kopie is stressed on the second syllable: ko-PIE

So roughly:

ZI-kher-oongs-ko-PEE

Sometimes, but it is not exactly the same in feel.

• beschriften = to write on or label something
• etikettieren = to attach a label / tag, or label in a more formal or physical sense

If you mean writing a name or description onto the backup copy or marking it, beschriften is very natural.

If you mean attaching an actual label sticker, etikettieren may also work.

So beschriften is a very good choice here.

The dictionary forms are:

• beschriften — infinitive, to label
• die Sicherungskopie — noun, the backup copy

If you look them up, you would normally find them in exactly those forms.