Om bilden är för suddig, borde du radera den och ta en ny.

Here om means if.

It introduces a condition:

• Om bilden är för suddig = If the image/picture is too blurry

This is very common in Swedish. After om, you usually get a normal clause with subject + verb:

• om bilden är ...
• om du vill ...
• om det regnar ...

Bilden is the definite form of bild, so it means the picture/image.

• en bild = a picture / an image
• bilden = the picture / the image

Since the sentence is talking about a specific image, Swedish uses the definite form bilden.

Because after om, Swedish uses normal subordinate-clause word order: subject + verb.

So:

• om bilden är för suddig

not:

• om är bilden för suddig

This is different from main clauses, where Swedish often follows verb-second word order.

Here för means too.

So:

• för suddig = too blurry
• för stor = too big
• för dyr = too expensive

This is a very common use of för. It does not mean the English preposition for in this sentence.

Because bild is an en-word (common gender), and the adjective agrees with it.

• en suddig bild = a blurry picture
• bilden är suddig = the picture is blurry

If the noun were an ett-word, you would often get -t:

• ett suddigt foto = a blurry photo

So here suddig matches bild(en).

Because the sentence starts with an if-clause, and then the main clause follows. In Swedish main clauses, the finite verb comes in the second position.

So:

• Om bilden är för suddig, borde du ...

This is the normal inversion pattern after an introductory element.

Compare:

• Du borde radera den.
• Om bilden är för suddig, borde du radera den.

In the second version, the om-clause takes the first position, so the verb borde comes before du.

Borde usually means should or ought to.

In this sentence, it gives advice or a recommendation:

• borde du radera den = you should delete it

It is softer than a command. It does not sound as direct as telling someone they must do it.

Usually that would change the meaning.

• borde = should / ought to → advice, recommendation
• ska = will / shall / are supposed to / must depending on context

So:

• Om bilden är för suddig, borde du radera den = advice
• Om bilden är för suddig, ska du radera den = more like an instruction or rule

If you want the softer English idea of should, borde is the better choice here.

Because Swedish needs an object pronoun here: delete it.

• radera = delete
• den = it

The noun bilden appeared earlier, but once you refer back to it, Swedish uses a pronoun:

• bilden → den

It is den and not det because bild is an en-word.

Swedish often leaves out the noun when it is obvious from context.

So:

• ta en ny = take a new one

The omitted noun is bild:

• ta en ny bild

Both are understandable, but ta en ny sounds very natural when the noun has just been mentioned.

Because the missing noun is bild, and bild is an en-word.

So the adjective and article match bild:

• en ny bild
• ta en ny

If the hidden noun were an ett-word, you would use:

• ett nytt foto
• ta ett nytt

It is natural, especially for a digital image or file, and it means delete.

But depending on context, Swedish speakers might also say:

• ta bort den = remove it
• släng den = throw it away (less technical, more informal)

So:

• radera den sounds a bit more like deleting a file/image
• ta bort den is broader and very common in everyday speech

The comma is acceptable and helps readability, especially after a long introductory clause.

• Om bilden är för suddig, borde du radera den och ta en ny.

In modern Swedish, this comma is often optional. Many people would also write:

• Om bilden är för suddig borde du radera den och ta en ny.

So the version with the comma is fine, but you may also see it omitted.