Ben her akşam yedekleme yapıyorum, böylece dosyaları kaybetmiyorum.

That’s right: Turkish often omits subject pronouns because the verb ending already tells you who the subject is.

• yapıyorum = I am doing / I do
• kaybetmiyorum = I am not losing / I don’t lose

So the sentence could simply be:

Her akşam yedekleme yapıyorum, böylece dosyaları kaybetmiyorum.

Including ben adds a little emphasis or clarity, similar to saying I do this every evening.

Her akşam means every evening.

• her = every / each
• akşam = evening

Together, they form a time expression. In Turkish, expressions like this usually come before the verb:

• Her gün = every day
• Her hafta = every week
• Her akşam = every evening

No extra word like -de or -da is needed here, because it is functioning as a general time adverb.

Turkish very often uses a noun + yapmak structure where English might prefer a single verb.

Here:

• yedekleme = backup / backing up
• yapmak = to do / to make

So yedekleme yapmak literally means to do a backup, but in natural English we translate it as to back up.

This pattern is very common in Turkish:

• araştırma yapmak = to do research
• alışveriş yapmak = to shop / do shopping
• temizlik yapmak = to clean / do cleaning

So yedekleme yapıyorum is a very normal way to say I back things up / I am making a backup.

Yedekleme is a verbal noun derived from the verb yedeklemek (to back up).

You can think of it like this:

• yedekle- = back up
• -me / -ma can form a noun from a verb

So yedekleme means something like:

• backing up
• backup
• the act of making a backup

In this sentence, it combines with yapmak to form the expression yedekleme yapmak.

Yes, -iyor is the present continuous form, but in Turkish it is also very commonly used for regular habits, not just actions happening right now.

So:

• Her akşam yedekleme yapıyorum can mean
  I back up every evening
  or
  I am backing up every evening

In English, we often use the simple present for habits, but Turkish often uses -iyor in these cases too, especially when talking about a repeated routine.

It breaks down like this:

• yap- = do / make
• -ıyor = present continuous marker
• -um = I

So:

yapıyorum = I am doing / I do

Because of vowel harmony and sound patterns, the ending appears as -ıyor here, not -iyor.

Böylece means something like:

• thus
• so
• in this way
• as a result

In this sentence, it links the two ideas:

• I back up every evening
• so / thus / in this way I don’t lose the files

It shows result or consequence.

Sometimes yes, but they are not exactly the same.

• böylece = thus / in this way / as a result
• bu yüzden = because of this / for this reason / therefore

In your sentence, böylece fits well because it emphasizes the method and result:
I do this, and in this way I don’t lose the files.

Bu yüzden would sound more like a logical consequence. It is possible in some contexts, but böylece is especially natural when one action helps produce the result.

Because dosyaları is the definite accusative form.

• dosyalar = files
• dosyaları = the files / specific files (as the direct object)

The direct object is marked with accusative when it is specific or definite.

So:

• Dosyaları kaybetmiyorum = I don’t lose the / my specific files
• Dosya kaybetmiyorum = I don’t lose files / I don’t lose any files in general

In this sentence, the speaker probably means specific files they care about, so dosyaları makes sense.

That final -ı is the accusative suffix.

Breakdown:

• dosya = file
• dosyalar = files
• dosyaları = the files (as a definite direct object)

The accusative suffix changes according to vowel harmony:

• -ı
• -i
• -u
• -ü

Here it becomes -ı.

Also note that dosyaları can sometimes mean his/her files in other contexts, but here it clearly means the files as the object of the verb.

Good question. Turkish does sometimes leave a noun singular where English uses a plural, especially after numbers:

• iki kitap = two books

But here the speaker is talking about multiple specific files, so dosyalar is natural.

• dosyaları kaybetmiyorum = I don’t lose the files

Using the plural makes it clear that more than one file is involved.

It breaks down like this:

• kaybet- = lose
• -miyor = present continuous negative
• -um = I

So:

kaybetmiyorum = I am not losing / I don’t lose

The negative marker is -mA-, but before the -iyor form it appears as part of -miyor.

Compare:

• kaybediyorum = I am losing
• kaybetmiyorum = I am not losing

Because these two verbs mean different things:

• kaybetmek = to lose something
• kaybolmak = to get lost / disappear

In your sentence, the subject is I, and the object is the files.
So the meaning is I don’t lose the files, which requires kaybetmek.

If you said dosyalar kaybolmuyor, that would mean the files don’t get lost.

Both can be correct in different situations, but they are not the same structure.

The sentence as written says:

I back up every evening, so I don’t lose the files.

That is a straightforward cause-and-result statement.

If you said:

Dosyaları kaybetmemek için her akşam yedekleme yapıyorum.

that would mean:

I back up every evening in order not to lose the files.

So the difference is:

• böylece ... kaybetmiyorum = result: so I don’t lose them
• kaybetmemek için = purpose: in order not to lose them

Both are natural, but they express the relationship a little differently.

The sentence follows a very typical Turkish pattern:

Ben | her akşam | yedekleme | yapıyorum, | böylece | dosyaları | kaybetmiyorum.

That is roughly:

Subject | time | object-like element | verb | connector | object | verb

Turkish usually places the verb at the end of each clause. Time expressions often come early.

So this sentence feels very natural.

Yes, Turkish word order is flexible, but the original version is very natural.

For example:

• Her akşam ben yedekleme yapıyorum, böylece dosyaları kaybetmiyorum.
• Dosyaları böylece kaybetmiyorum.

These are possible, but changing word order can shift emphasis.

The original sentence is a good neutral version.

It is helpful and natural in writing because böylece introduces the result clause.

So the comma makes the structure clearer:

• first clause: Ben her akşam yedekleme yapıyorum
• second clause: böylece dosyaları kaybetmiyorum

In informal writing, punctuation may vary, but the comma is a good choice.

Yedekleme yapmak is perfectly understandable and natural.
Another very common option is:

yedek almak = to make a backup / take a backup

So you might also hear:

Her akşam yedek alıyorum, böylece dosyaları kaybetmiyorum.

Both are used. Yedek almak can sound a bit more idiomatic in everyday speech, but yedekleme yapmak is also correct and common.

Both clauses describe a regular present-time situation:

• yedekleme yapıyorum = I back up / I am backing up
• kaybetmiyorum = I don’t lose / I am not losing

Using the same tense keeps the sentence balanced and natural. The idea is that one repeated action leads to a repeated result.

So the structure is essentially:

I regularly do X, so I regularly avoid Y.