We are not sure whether he (Aboo Hurayrah) had any written collection of ahaadeeth in his early life, but mention is made in a later period of the books he had in his possession:
1) Hasan Ibn ‘Amr saw many books of ahaadeeth in Aboo Hurayrah’s possession. [Ibn Hajr, Fath Al-Baaree, 1/217]
2) It is said that Basheer Ibn Naheek made his collection, copying he book of Aboo Hurayrah, bu the isnaad of this statement is somewhat defective.
The following derived hadeeth from him in written form:
1) ‘Abdul-‘Azeez Ibn Marwaan: He had almost all the hadeeth of Aboo Hurayrah in written form. [Ibn Sa’d, Tabaqaat, 7/157]
2) Aboo Saalih Al-Sammaan: He transmitted from Aboo Hurayrah and others. Al-A’mash wrote down 1000 hadeeth from him [‘Alee Ibn Ja’d, Musnad, 80]; and Ibraheem An-Nakha’ee (d. 96H) made his collection of Aboo Hurayrah’s hadeeth through Al-A’mash – Aboo Saalih – Aboo Hurayrah [Ahmad Ibn Hanbal, ‘Ilal 1/140]. It is not mentioned whether or not Aboo Saalih himself had any written collection, but his son Suhail had a written collection fro him. Therefore, most probably Aboo Saalih had a written collection from Aboo Hurayrah.
3) ‘Aqbah Ibn Aboo Al-Hasnaa: He transmitted a book from Aboo Hurayrah. A copy of this book was in the possession of Adh-Dhahabee. [Adh-Dhahabee, Meezaan Al-‘Itidaal, 3/85]
4) Basheer Ibn Naheek: He made his collection from Aboo Hurayrah, and presented the book to him and even obtained Aboo Hurayrah’s permission to transmit it. [Ibn Hajr, Tahdheeb, 1/470]
5) Hammaam Ibn Munabbih: He transmitted from Aboo Hurayrah a saheefah (book) which has been edited and published.
6) Marwaan Ibn Hakam: He made a collection of Aboo Hurayrah’s hadeeth. It was copied by Aboo Al-Za’zaa. [Siyar A’laam An-Nubulaa, 2/431]
7) Muhammad Ibn Sireen: The book was written on an old parchment… This book was in the possession of Yahyaa Ibn Sireen, because in his later days Muhammad Ibn Sireen did not like to have any sort of books. [Al-Khateeb Al-Baghdaadee, Jaami’ 56b]
8) Sa’eed Al Maqburee: Muhammad Ibn ‘Ajlaan had the book of Sa’eed which he had compiled from Aboo Hurayrah. [Ibn Hajr, Tahdheeb, 9/342]
9) ‘UbaydAllaah Ibn ‘Abdullaah Ibn Mauhab Al-Taimee: His son related a book from him most of which consisted of defective hadeeth. [Ibn Hajr, Tahdheeb, 11/254]
Other students of Aboo Hurayrah who wrote down hadeeth (not necessarily from Aboo Hurayrah) include:
1) ‘Abdullaah Ibn Hurmuz. [Hanbal, 2/531]
2) ‘Abdul-Rahmaan Ibn Hurmuz Al-A’raj (40 – 117). [Ibn Hajr, Tahdheeb, 5/291]
3) ‘Awn Ibn ‘Abdullaah Ibn ‘Utbah. [Ibn Hajr, Tahdheeb, 8/173]
4) Habeeb Ibn Saalim Al-Ansaaree (40 – 110).Hanbal, 4/273]
5) Muhammad Ibn Ziyaad Al-Qurashi (35 – 120). [Ma’rifah, 164]
6) Saalih Ibn Nabhaan (40 – 125). [Ibn Hajr, Tahdheeb, 4/406]
7) Yazeed Ibn Abee Habeeb (53 – 128). [Ahmad Ibn Hanbal, ‘Ilal, 142b]
8) Zayd Ibn Aslam – Client of Ibn ‘Umar (40 – 136). [Ibn Hajr, Tahdheeb, 3/396 & 7/8]
[Taken from “Studies In Early Hadeeth Literature”, by M. M. Al-Azami, Suhail Academy, Lahore, Pakistan, 2001. Pp. 37-38, 60, 76, 81, 82, 95, 100, 105 & 106]