He guardado cuatrocientos archivos en la nube y todavía me faltan algunos por ordenar.

In Peninsular Spanish, he guardado (the pretérito perfecto) is very commonly used for actions in the recent past or for past actions that still matter now.

So:

• He guardado cuatrocientos archivos... = I’ve saved/stored four hundred files...
• This suggests the action is connected to the present situation, because the speaker is still talking about what remains to be done: todavía me faltan algunos por ordenar.

In much of Latin America, many speakers would more naturally say guardé in the same context. But in Spain, he guardado is especially natural here.

Me faltan literally means something like are lacking to me, but in natural English it usually means:

• I still have ... left
• I’m still missing ...
• I still need to do ...

In this sentence:

• todavía me faltan algunos por ordenar
• literally: some are still missing to me to organize
• natural meaning: I still have some left to organize

A very important point:

• me = to me / for me
• faltan agrees with algunos, not with me

So the grammatical subject is algunos.

Because the verb agrees with algunos, which is plural.

Breakdown:

• algunos = some
• algunos ... faltan = some are still missing / some are still left

Compare:

• Me falta uno. = I still have one left.
• Me faltan algunos. = I still have some left.

So the verb changes depending on what is left, not on me.

Because algunos is standing in for algunos archivos.

Spanish often leaves out a noun when it is already understood from context, just like English can do with some.

So:

• me faltan algunos por ordenar
• means I still have some files left to organize

You could say the full version:

• todavía me faltan algunos archivos por ordenar

But it sounds more natural to omit archivos because it has already been mentioned.

Por + infinitive often means left to do, still to be done, or pending.

So:

• algunos por ordenar = some left to organize / some still to sort

This is a very common Spanish structure.

Examples:

• Tengo mucho por hacer. = I have a lot to do.
• Quedan dos temas por discutir. = There are two topics left to discuss.
• Hay varios correos por responder. = There are several emails left to answer.

Here, por ordenar does not mean purpose. It means unfinished work.

Because por and para do different jobs.

Here, por ordenar means still to be organized or remaining to organize.

• por + infinitive = pending / left to do
• para + infinitive = in order to / for the purpose of

So:

• Me faltan algunos por ordenar. = I still have some left to organize.
• Los separé para ordenarlos después. = I separated them in order to organize them later.

Using para ordenar in the original sentence would change the meaning and sound unnatural there.

Todavía means still.

It shows that the second action is not finished yet:

• todavía me faltan algunos por ordenar
• I still have some left to organize

It emphasizes continuation.

In many contexts, todavía and aún can both mean still:

• Todavía me faltan algunos...
• Aún me faltan algunos...

Both are correct. Todavía is often felt to be slightly more common in everyday speech.

Because cuatrocientos must agree in gender with the noun it describes.

• archivo is masculine
• plural: archivos
• so: cuatrocientos archivos

If the noun were feminine, you would use cuatrocientas:

• cuatrocientas carpetas = four hundred folders

So:

• masculine plural noun → cuatrocientos
• feminine plural noun → cuatrocientas

En la nube means in the cloud.

This is the normal Spanish expression for cloud storage or cloud computing.

Spanish often uses the definite article where English may or may not use one. So:

• guardar archivos en la nube = to save files in the cloud

It is a set, idiomatic expression in modern Spanish.

Guardar can mean several related things, including:

• to save
• to store
• to keep

In a digital context, it often means save or store, depending on the situation.

So:

• He guardado cuatrocientos archivos en la nube can be understood as
• I’ve saved four hundred files to the cloud or
• I’ve stored four hundred files in the cloud

If the focus were specifically on transferring files upward to a cloud service, subir might also be possible:

• He subido cuatrocientos archivos a la nube

But guardar sounds very natural if the focus is on the result: the files are now saved there.

Because me is an unstressed object pronoun, and with a conjugated verb it normally goes before the verb.

So:

• me faltan not
• faltan me

This is standard Spanish pronoun placement.

Compare:

• Me gusta
• Me quedan dos
• Me faltan algunos

If you use an infinitive or gerund, pronouns can sometimes attach to the end, but not here because faltan is a fully conjugated verb.

Yes, both are possible, with small differences in tone.

1. Aún instead of todavía

   • Aún me faltan algunos por ordenar
   • This means the same thing: I still have some left to organize

2. Quedan instead of faltan

   • Todavía me quedan algunos por ordenar
   • also very natural
   • means roughly I still have some left to organize

Difference in feeling:

• me faltan often emphasizes what is still missing
• me quedan often emphasizes what remains

In many everyday situations, the difference is small.

The given order is very natural:

• He guardado cuatrocientos archivos en la nube y todavía me faltan algunos por ordenar.

Spanish word order is somewhat flexible, but not all alternatives sound equally natural.

Possible variations:

• Todavía me faltan algunos por ordenar.
• Me faltan todavía algunos por ordenar.

These are possible, but the original version sounds smooth and standard.

What you would normally avoid is moving things around in a way that makes the sentence heavy or unnatural, especially with short pronouns like me.

The original order is a good model to follow.