I have several large scanned .pdf files (400 – 650mb) I need to convert to a searchable text format using an OCR or similar product. The original .pdfs are in German. There is no need for file sharing or other cloud services. Will Acrobat DC accomplish this? Any issues with the large file sizes? Thanks in advance.
Will Acrobat DC accomplish this? - Yes.
Any issues with the large file sizes? - Should be fine, although it could take a while. You might want to try the trial version first, though, to make sure it works before purchasing the full version (although you can also subscribe to it on a monthly basis, if you prefer).
As for sharing the files on a cloud service? - This is an optional feature. You don't have to do it if you don't want to.