صاحبي قال لي كلمة السر على التليفون، وانا كتبتها في الملف.

Yes. صاحبي in Egyptian Arabic means my friend, my buddy, or my pal.

It comes from صاحب (friend / companion) + ـي (my).

A learner should also know the nuance:

• صاحبي sounds very natural and colloquial in Egyptian.
• It is often more casual and conversational than صديقي, which sounds more formal or closer to Standard Arabic.

So in everyday Egyptian, صاحبي is a very normal choice.

Because Arabic uses لـ (to) with قال in this kind of sentence.

• قال = he said
• لي = to me

So قال لي literally means he said to me, and in natural English that often becomes he told me.

This is a very common Arabic pattern:

• قال لي = he told me
• قال لها = he told her
• قال لهم = he told them

So even if English says told me, Arabic often uses the structure said to me.

Literally, كلمة السر means the word of the secret or secret word.

But as a fixed expression, it means:

• password
• sometimes passcode, depending on context

Breakdown:

• كلمة = word
• السر = the secret

This is an iḍāfa structure (a noun + another noun that specifies it), which is very common in Arabic.

Because the pronoun refers to كلمة السر, and the head noun كلمة is grammatically feminine.

Breakdown:

• كتبت = I wrote
• ها = it

So كتبتها = I wrote it

Even though password in English does not feel feminine, Arabic grammar follows the gender of the Arabic noun:

• كلمة is feminine
• so the pronoun becomes ها

This is a very important point for learners: pronouns in Arabic agree with the grammatical gender of the noun they refer to.

كتبتها has three parts:

• كتب = the root related to writing
• كتبت = I wrote
• ها = it / her

So the full meaning is I wrote it.

In this sentence, it refers to the password.

This kind of object pronoun attachment is extremely common in Arabic:

• كتبته = I wrote it (masculine object)
• كتبتها = I wrote it (feminine object)
• كتبتهم = I wrote them

Here على التليفون means on the phone or over the phone.

Even though على literally often means on, Arabic uses it idiomatically in expressions like this.

So:

• قال لي كلمة السر على التليفون = He told me the password over the phone

This is one of those combinations that you should learn as a chunk:

• على التليفون = on the phone / over the phone

Yes. التليفون is a very normal word in Egyptian Arabic.

It comes from a borrowing of telephone, adapted to Arabic pronunciation.

Depending on context, Egyptians might also say:

• الموبايل = the mobile phone / cell phone
• الهاتف = phone, but this sounds more formal or Standard Arabic

So in everyday Egyptian:

• على التليفون sounds natural
• على الموبايل may also be very common, depending on the situation

In informal Egyptian writing, the hamza is often omitted, so وانا is a casual spelling of وأنا.

It is simply:

• و = and
• أنا = I

So وانا means and I.

In more careful spelling, you may see:

• وأنا

But in chats, messages, and casual writing, وانا is extremely common.

في الملف means in the file.

• في = in
• الملف = the file

The exact meaning of file depends on context:

• a computer file
• a document
• a folder
• a case file

In this sentence, if someone gives a password and the speaker writes it down, الملف could very naturally mean:

• a digital file on a computer
• or a document/folder where information is kept

Arabic leaves that open unless more context is given.

Because the speaker is referring to a specific file that is known or understood from context.

So:

• في الملف = in the file
• في ملف = in a file

Arabic often uses the definite article when the speaker assumes the listener knows which thing is meant.

In this sentence, الملف suggests:

• there is a particular file the speaker has in mind

It is clearly Egyptian Arabic or at least strongly colloquial.

Some clues:

• صاحبي is very colloquial and Egyptian-sounding
• التليفون is common colloquial vocabulary
• وانا is a casual written form
• the whole sentence has an everyday spoken feel

A more Standard Arabic version might be something like:

• صديقي قال لي كلمة السر عبر الهاتف، وأنا كتبتها في الملف.

That said, an Arabic speaker from another region would still probably understand the original sentence.

A simple learner-friendly pronunciation would be:

Saahbi 'aal li kalmet es-sirr 'ala t-telefoon, w ana katabtaha fil-malaf.

A few notes:

• صاحبي sounds like saahbi
• قال in Egyptian is often pronounced 'aal
• كلمة السر is often heard as kalmet es-sirr
• في الملف often sounds connected as fil-malaf

You do not need to pronounce every word in a very separate way. In natural speech, Egyptian Arabic links words together smoothly.

This is a very normal Arabic word order.

Breakdown:

• صاحبي = my friend
• قال لي = told me
• كلمة السر = the password

So the sentence is:

• My friend told me the password

Arabic is flexible with word order, but this subject + verb + indirect object + direct object pattern is perfectly natural in colloquial speech.

If you changed the order, the meaning might stay the same, but the sentence could sound more marked or less neutral. The version here is simple and natural.