البطاقة الجديدة من البنك في حقيبتي، لكن المال ليس فيها.

In Arabic, a present-tense sentence like X is Y usually does not need a separate word for is.

So:

البطاقة الجديدة من البنك في حقيبتي

literally looks like:

the new card from the bank in my bag

but naturally means:

The new card from the bank is in my bag.

This is very normal in Arabic. If you wanted was, you would use كان.

ليس is commonly used to mean is not / are not in this kind of sentence.

So:

المال ليس فيها

means:

The money is not in it.

Arabic does not usually negate this kind of sentence by inserting a word exactly like English not after an omitted is. Instead, ليس does the job.

In Arabic, adjectives normally come after the noun they describe.

So:

• البطاقة = the card
• الجديدة = the new

Together:

البطاقة الجديدة = the new card

The adjective must agree with the noun in several ways, including definiteness. Since البطاقة is definite because it has ال, the adjective must also be definite:

• بطاقة جديدة = a new card
• البطاقة الجديدة = the new card

من usually means from.

So:

من البنك = from the bank

In this sentence, it describes the card:

البطاقة الجديدة من البنك = the new card from the bank

In natural English, depending on context, this could also feel like the new bank card or the new card issued by the bank.

حقيبتي means my bag.

It comes from:

• حقيبة = bag
• ـي = my

So:

حقيبة + ي → حقيبتي

A very important point: when a noun ends in ة (taa marbuuTa), that ending becomes ت before a suffix.

So:

• حقيبة = bag
• حقيبتي = my bag

Also, Arabic normally does not use ال with a possessive suffix.
So حقيبتي already means my bag, and you do not say الحقيبتي.

فيها is made of two parts:

• في = in
• ها = her / it for a feminine singular noun

So:

فيها = in it or in her

Arabic often attaches pronouns directly to prepositions:

• فيه = in him / in it (masculine)
• فيها = in her / in it (feminine)
• فيهم = in them

So ليس فيها means is not in it.

Grammatically, ها can refer to a feminine singular noun mentioned earlier.

In this sentence, both of these are feminine singular:

• البطاقة = the card
• حقيبة (in حقيبتي) = bag

So purely grammatically, فيها could point to either one.

But by meaning, the most natural interpretation is that it refers to حقيبتي:

لكن المال ليس فيها = but the money is not in it [the bag]

If someone wanted to remove any ambiguity, they could repeat the noun:

لكن المال ليس في الحقيبة = but the money is not in the bag

This is a very common question.

• لكن = but
• لكنَّ = a stronger, more formal particle, often translated as but / however, and it affects the grammar of the following noun

In everyday unvowelled writing, the difference is not always obvious.

In your sentence, it is most naturally understood as the simple conjunction:

لكن المال ليس فيها = but the money is not in it

A more formally marked version with لكنَّ would be:

لكنَّ المالَ ليس فيها

So learners should know that both forms exist, but here لكن as plain but is the easiest reading.

Here is the gender of the main nouns:

• البطاقة = feminine
• حقيبة = feminine
• المال = masculine
• البنك = masculine

This matters because Arabic grammar shows agreement.

For example:

• البطاقة الجديدة: the adjective is feminine because بطاقة is feminine
• فيها: the pronoun ها is feminine, so it refers to a feminine noun

Gender is one of the main things Arabic learners need to watch for.

The first clause can be understood like this:

• البطاقة الجديدة من البنك = the subject phrase, the new card from the bank
• في حقيبتي = the predicate, in my bag

So the whole clause means:

The new card from the bank is in my bag.

A useful thing to notice is that من البنك belongs with البطاقة الجديدة, not with حقيبتي.

A careful reading with full case endings would be approximately:

al-biṭāqatu al-jadīdatu mina al-banki fī ḥaqībatī, lākin al-mālu laysa fīhā.

A more natural pause-form reading, which many learners hear more often, is:

al-biṭāqa al-jadīda min al-bank fī ḥaqībatī, lākin al-māl laysa fīhā.

If you are reading without full case endings, the second version is usually the easier one to imitate.