النسخة الاحتياطية على الكمبيوتر.

A natural Egyptian-style pronunciation is:

en-noskha l-eḥteyāṭeyya ʿal-kombyūter

A few notes:

• النسخة is pronounced en-noskha, not al-nuskha, because the ال changes sound before ن.
• على is often pronounced ʿala, but in fast speech before الكمبيوتر it commonly becomes ʿal-.
• الكمبيوتر is usually pronounced something like el-kombyūter.

So in connected speech, you will often hear:

en-noskha l-eḥteyāṭeyya ʿal-kombyūter

Because Arabic often leaves out the verb to be in the present tense.

So:

النسخة الاحتياطية على الكمبيوتر

literally looks like:

the backup copy on the computer

but it means:

The backup copy is on the computer.

This is a very common Arabic pattern, including in Egyptian Arabic. In the present tense, Arabic usually does not say a separate word for is / am / are.

It breaks down like this:

• النسخة = the copy or the version
• الاحتياطية = backup / reserve / precautionary

Together:

• النسخة الاحتياطية = the backup copy
• or more naturally, the backup

In tech contexts, this is the normal expression for backup copy.

Because in Arabic, adjectives normally come after the noun they describe.

So:

• نسخة = copy
• احتياطية = backup
• نسخة احتياطية = a backup copy

This is the opposite of English, where adjectives usually come before the noun.

Because Arabic adjectives match the noun in definiteness.

So if the noun is definite:

• النسخة = the copy

then the adjective must also be definite:

• الاحتياطية = the backup

That gives:

• النسخة الاحتياطية = the backup copy

Compare:

• نسخة احتياطية = a backup copy
• النسخة الاحتياطية = the backup copy

This matching is very important in Arabic.

Because نسخة is a feminine singular noun, and the adjective must agree with it.

• نسخة is feminine
• so the adjective must also be feminine:
  • احتياطي = masculine
  • احتياطية = feminine

So:

• نسخة احتياطية = correct
• نسخة احتياطي = not correct in standard grammar

In other words, the ـة / -a ending helps show feminine agreement here.

على literally means on, and في means in.

With computers, Arabic often uses على الكمبيوتر in the same way English says on the computer.

So:

• على الكمبيوتر = on the computer

If you said في الكمبيوتر, it would sound more like inside the computer, which is less natural in this context unless you really mean physically inside it.

The wording is very close to Modern Standard Arabic, but it is also easy for Egyptians to understand and use, especially in formal or semi-formal contexts.

What makes it feel less purely colloquial:

• النسخة الاحتياطية is a fairly formal/standard phrase

What makes it usable in Egyptian speech:

• Egyptians absolutely use phrases like this, especially for technology
• the pronunciation would shift to Egyptian, for example:
  • en-noskha l-eḥteyāṭeyya ʿal-kombyūter

So you can think of it as:

• standard in wording
• Egyptian in pronunciation if spoken by Egyptians

Yes. كمبيوتر is a borrowed word from computer.

In Arabic script:

• كمبيوتر = computer
• الكمبيوتر = the computer

This is very common in Egyptian Arabic. Many technology words are borrowed or adapted from English.

It can be a full sentence.

As a full sentence, it means:

The backup copy is on the computer.

This works because Arabic allows nominal sentences with no present-tense is.

Depending on context, it could also function like a short label or note, but grammatically it can definitely stand as a complete sentence.

You would remove ال from both the noun and the adjective:

نسخة احتياطية على الكمبيوتر

That means:

A backup copy is on the computer.

Compare:

• نسخة احتياطية = a backup copy
• النسخة الاحتياطية = the backup copy

Again, the noun and adjective match each other in definiteness.

It is a prepositional phrase:

• على = on
• الكمبيوتر = the computer

Together:

• على الكمبيوتر = on the computer

In the sentence, this prepositional phrase tells you where the backup copy is.

So the structure is:

• النسخة الاحتياطية = the topic / subject-like part
• على الكمبيوتر = the location

Meaning:

• The backup copy is on the computer.

Yes. The ال in النسخة is pronounced en- here, not al-.

That is because ن is a sun letter, so the ل sound of ال assimilates to the next consonant.

So:

• written: النسخة
• pronounced: en-noskha

This is a very common feature in Arabic pronunciation and worth getting used to.