Si escric la contrasenya malament, no puc obrir la carpeta.

Escric is the 1st person singular present tense form of escriure (to write / to type / to enter).

• escriure = infinitive = to write
• escric = I write / I type
• escriu = he/she writes or you write (formal)

So Si escric... means If I write/type...

In this sentence, Catalan uses the present tense after si to talk about a real or possible condition:

• Si escric la contrasenya malament... = If I type the password incorrectly...

This is very normal in Catalan.

This is a very common confusion.

• si = if
• sí = yes

So in your sentence:

• Si escric la contrasenya malament... = If I type the password incorrectly...

But:

• Sí by itself means yes

The accent mark changes the meaning completely.

Malament is an adverb, meaning badly, wrongly, or incorrectly.

It modifies the verb escric:

• escric malament = I write/type incorrectly

Catalan uses malament where English often uses expressions like:

• wrong
• incorrectly
• the wrong way

So:

• Si escric la contrasenya malament literally means If I write/type the password badly
• but in natural English it is If I type the password incorrectly / wrong

Because malament is the form that works naturally as an adverb here.

Compare:

• malament = adverb = badly / incorrectly
• mala = feminine adjective = bad
• mal = masculine adjective, and in some contexts an adverb, but not the usual choice here

In this sentence, you are not describing the password as bad. You are describing the action of typing it as incorrect.

So:

• la contrasenya mala would mean the bad password, which is not the idea
• escric ... malament means I type/write ... incorrectly

In Catalan, standard negation is usually made by putting no before the conjugated verb.

Here the conjugated verb is puc (I can):

• no puc = I cannot / I can’t

So:

• no puc obrir la carpeta = I can’t open the folder

This is the normal Catalan pattern:

• No parlo català = I don’t speak Catalan
• No vull marxar = I don’t want to leave
• No puc obrir la carpeta = I can’t open the folder

Because after poder (to be able to / can), Catalan normally uses the infinitive directly, with no extra word.

So:

• puc obrir = I can open
• pots venir = you can come
• podem fer-ho = we can do it

This is similar to English can open, not can to open.

Because obrir is the infinitive, and after puc Catalan uses an infinitive.

Compare:

• obro la carpeta = I open the folder
• puc obrir la carpeta = I can open the folder

So:

• puc is the conjugated verb
• obrir stays in the infinitive

Contrasenya means password.

It is a feminine noun:

• la contrasenya = the password

You may also see it in computer or online contexts:

• He oblidat la contrasenya = I forgot the password
• Introdueix la contrasenya = Enter the password

In this sentence, escriure la contrasenya means to type/write the password.

Carpeta means folder.

Depending on context, it can be:

• a physical folder
• a computer folder

In this sentence, it could easily be either one, though many learners will understand it as a computer folder because of the password context.

It is also feminine:

• la carpeta = the folder

Because both nouns are feminine singular:

• la contrasenya
• la carpeta

Catalan articles must agree with the noun’s gender and number.

Here:

• la = feminine singular definite article
• contrasenya = feminine singular
• carpeta = feminine singular

So the article is required and matches both nouns.

The comma is natural and helpful because the sentence begins with a conditional clause:

• Si escric la contrasenya malament, no puc obrir la carpeta.

That first part, Si escric la contrasenya malament, sets up the condition.
Then the main clause follows: no puc obrir la carpeta.

In writing, the comma makes the structure clearer. You may sometimes see variation, but using the comma here is a good choice.

Yes. Catalan allows some flexibility.

For example:

• No puc obrir la carpeta si escric la contrasenya malament.

This means the same thing: I can’t open the folder if I type the password incorrectly.

The version with si first is often a little more natural when you want to present the condition first:

• Si X, Y

Yes. In Catalan, escriure can be used quite broadly for writing or typing, depending on context.

So in a password sentence, escriure la contrasenya is naturally understood as:

• to type the password
• to enter the password

If you wanted to be more explicit, Catalan might also use:

• introduir la contrasenya = to enter the password

But escriure is perfectly normal here.

It can naturally suggest a general condition:

• Whenever/if I type the password incorrectly, I can’t open the folder.

Catalan often uses the present tense in this kind of if-clause and in the result clause for general or real conditions.

So the sentence is not strange at all. It sounds like a normal statement of what happens under that condition.