What kink of files iCloud drive supports?

No, you are limited as to what types of files you can host on iCloud, although most Image files formats are supported as are PDF's and several other document format

iCloud Drive FAQ - Apple Support

you can not host Non-Apple Store purchased files such as music and video in various formats last I tired.

if you need to host the file types you mention try google drive, one drive or dropbox, etc.

JimmyCMPIT wrote:

No, you are limited as to what types of files you can host on iCloud, although most Image files formats are supported as are PDF's and several other document format

iCloud Drive FAQ - Apple Support

The FAQ cited contradicts your assertion that the types of file are limited:

"What types of files can I store in iCloud Drive?

"You can store any type of file in iCloud Drive, as long as it's less than 15 GB in size and you don't exceed your iCloud storage limit. There's no restriction on file type, so you keep all of your work documents, school projects, presentations, and more up to date across all of your devices."

That said, some application-created "files" are really packages with internal component files that iCloud Drive may not be able to keep synchronized properly as needed by the creating applications. (Some of them may not work well with Dropbox or OneDrive either.)

Disregard what I stated. I just sent a small zip file over iCloud and it worked as Markwmsn stated, however in the past I may have been restricted to the size of the individual file (smaller than the total space) I don't know if that is the case, was the case or still is the case.

Sorry for the mix up.

iCloud: iCloud storage and backup overview

JimmyCMPIT wrote:

No, you are limited as to what types of files you can host on iCloud, although most Image files formats are supported as are PDF's and several other document format

iCloud Drive FAQ - Apple Support

you can not host Non-Apple Store purchased files such as music and video in various formats last I tired.

if you need to host the file types you mention try google drive, one drive or dropbox, etc.

That is entirely incorrect, you can store a file of any type on iCloud. Where did you get such bad information, do you have a link.

markwmsn wrote:

JimmyCMPIT wrote:

No, you are limited as to what types of files you can host on iCloud, although most Image files formats are supported as are PDF's and several other document format

iCloud Drive FAQ - Apple Support

The FAQ cited contradicts your assertion that the types of file are limited:

That said, some application-created "files" are really packages with internal component files that iCloud Drive may not be able to keep synchronized properly as needed by the creating applications. (Some of them may not work well with Dropbox or OneDrive either.)

iCloud does not 'sync' anything, it is a common storage area for iCloud clients of the same account. The reason things look as if they are 'synced' is because everything attached to the account sees the same files. That will also apply to OneDrive and DropBox etc.

Csound1 wrote:

markwmsn wrote:

That said, some application-created "files" are really packages with internal component files that iCloud Drive may not be able to keep synchronized properly as needed by the creating applications. (Some of them may not work well with Dropbox or OneDrive either.)

iCloud does not 'sync' anything, it is a common storage area for iCloud clients of the same account. The reason things look as if they are 'synced' is because everything attached to the account sees the same files. That will also apply to OneDrive and DropBox etc.

OK, I could have been clearer. Because iCloud Drive (OD,DB) clients keep local copies of iCloud Drive (OD,DB) files, the effect of maintaining those local files is essentially equivalent to a "sync" operation among the clients. Changes in one of those local files take a certain amount of time to propagate to the "master" copy in the cloud, and those changes can "cross on the wire."

The iCloud clients (ditto OneDrive and DropBox) may not be compatible with all package types, because some creating programs expect the component files in the package to be interrelated in certain ways and stable in certain ways. If the (say) AmazingDB program on client A changes some files in package X at nearly the same time as the same program on client B changes the corresponding files, the client iCD/OD/DB code may not propagate the changes in a manner compatible with the AmazingDB data flow, if AmazingDB is not written to take the cloud aspect into consideration. [Apologies to any actual application named AmazingDB.]

In iCloud that would cause a delay before the file is freed for use, I don't use so don't know how Dropbox handles it but Onedrive keeps the file locked until closed, posting changes from another user after saving by the first, simultaneous editing always causes a conflict, but most services can deal with it. Provided the file has been saved and uploaded fully all files can be saved. DataBases (iPhoto/iTunes etc) are handled correctly by iCloud but not by OneDrive and DropBox.

Report my post if you feel inclined.

Why should I, it has been clearly pointed out to be wrong.